nickpic, I'm sorry to read you're having such a hard time. I do worry a bit, as I've been where you are, a mum with cancer who died not too long after diagnosis during an already turbulent time in my life. Grief is tough and it's easy to go back and forth between not looking after yourself when you feel others deserve your attention more and magnifying everything and making your outer appearance important to sort of deflect the fact that you're barely holding it together inside and one wrong question or comment can painfully bring it to a head. In a roundabout way, I'm asking if it's possible there's a psychological aspect to how you perceive your skin issues currently and how it's affecting you? Do you have support in RL?
I'm not so good with the makeup, Olli will know better. Wrt skincare we can all contribute but it's going to take a bit of time and it would be helpful to know more, so using the form in the OP makes that easier on us to give specific guidance and avoid you falling prey to false promises by the cosmetics industry. Dehydrated isn't a skin type, it's a condition and if your issues are pores/blackheads + dehydration you need to tackle both to see results with either. I also have to agree with Victoria and JDSTER that a manual exfoliating cleansing brush like a Clarisonic or similar versions like the Olay rarely do any good and are more likely to exasperate your skin issues long term.
Lego, I wouldn't bump up P50W to daily use. Unless someone has serious turnover issues chemical exfoliants shouldn't really be used more than 2-3x a week. If you feel you'd like more from it, then consider trading up to the full P50 or the PIGM/V version at some point. What else did you get in from TO and are already using? Nia could go in the morning if you're not using Vit C.
I think we should all agree that Lego has exclusive rights to the username BaggyPagansBottom or was it bottoms? from now on 
Olli have you thought about taking a sheetmask with you to the hospital? That sunblock is intriguing, I'm wondering how thick it is and if you'd get a decent amount on without it feeling heavy.
ilovetocook, you're welcome, I'm glad it's working out for you 
I've never used it myself, Enid, but I know a few people who swear by Syoss (think it was recently launched in the UK at Tesco's), specifically the olaplex sounding shampoo and conditioner. They're giant bottles and dirt cheap and a daughter brand of Schwarzkopf but basically salon quality stuff not dissimilar to the Schwarzkopf professional line supposedly. They might have a clarifying shampoo in the lineup too? Not sure the conditioners would meet your requirements mint, think they might be siliconey.
userallusedup, I think there were two people who asked about glamglow in the 50 shades technique. I did see a video on youtube the other day where someone did actually use the glamglow and she has sensitive acne prone skin so I'm guessing it works.
otyt, the 7 skin method doesn't take long at all. Basically skin means toner in Korean and you basically pack in 7 layers of a hydrating toner one after the other while patting somewhat vigorously. Video . Takes a few minutes but you'd do it once and then as needed. I did it a while back after being ill and only really doing a minimal routine. I know there are some who do it daily but they're the ones who previously used two sheetmasks a day 
. I think it could be done with the Superdrug Simply Pure Serum but can't say for sure having used a different product myself. I did end up spraying a bit of LRP Water in between the later layers as it was becoming more difficult to absorb. Basically it's a turbocharged way of addressing severe dehydration and plumping up the skin. I have also been seeing people on the AB reddit doing a 3 skin method as a modified way to incorporate it into a more regular routine. Small warning, if you already have full lips try to avoid the lip area as that can plump up too.
JDSTER, yes the ones you use are oil based cleansers and technically they do function the same but there's a lot of added ingredients in there whilst a straight oil cleanser has a higher % of oil in their ingredients. IME balms often need a bit of work to get off completely and for dry/normal skin a bit of oily residue isn't terrible but for clog-prone skin that isn't always ideal. Oil cleansers I like are as follows:
-The best I've ever tried was the Ultim8 Sublime from Shu Uemura, they're the pioneers of oil cleansers and there is a noticeable quality difference but it's not enough for me to justify the price leap up as well as the inclusion of fragrance (miraculously not irritating to me but still don't like the smell).
-DHC is a good allrounder and has shown good results in small studies in clearing out pores in acne/oily skinned folks. It's a tad strippy so for combo-oily much less of an issue than normal/dry. Should be easy to source a small version of it, not everyone does well with it (the olive oil base may have something to do with it)
-Muji Sensitive Skin Cleansing Oil is my staple, it's relatively affordable but it has to come from Japan (and gets cheaper when you buy in bulk). It's somewhat thicker so less likely to make a mess and very gentle. Something of a DHC lite, without the very strippy feeling at the end. Also olive oil based but mixed with a few esters (the Clinique TTDO liquid is all esters IIRC).
-Edenens Milky Cleansing Oil from EPP is an affordable alternative I found recently and I'm liking it a lot. I'm still slightly more partial to the Muji but if I'd never known about that one I'd be very happy with this.
-The Fancl Mild Cleansing Oil is also well liked but I've never tried it.
A lot of the AB oil cleansers (and the majority of the other Shu Uemura cleansers lineup) are Mineral Oil based, so I've never tried those as my skin just doesn't get on with it.