For skincare the 2 biggest things that will benefit your skin the most - sunscreen and proper cleansing aka double cleansing.
Invest in some high spf broad spectrum sunscreen asap and wear it everyday (yes even if you are indoors as uva rays can penetrate glass). Spf make up or moisturiser with spf is not enough to prevent uva/uvb damage. Japanese sunscreens give excellent protection, are very lightweight and absorb well.
Double cleanse in the evening. 1st cleanse use an oil based cleanser or balm to remove sunscreen/make up e.g. clinique take the day off balm. 2nd cleanse, to clean face and remove any residue, with a low ph cleanser (below 5.5). E.g. Cerave foaming cleanser (only available on amazon).
Check out Caroline Hirons blog for routine cheat sheets. Pls don't follow her product recs blindly - she is paid to recommend them! Skincare is trial and error so go slowly when introducing new products in case any cause irritation or breakouts.
I second everything mintbiscuit says re. skincare. Another good option for second cleanse is Cetaphil
For looking more groomed, have eyebrows shaped and tinted. Also, a manicure - just the routine kind, not gel nails or any of that. Shaped, buffed and neutral/clear polish - or very dark. Have shoes reheeled if needed - make sure shoes are in good nick, anyway. Just those few things will help you look better groomed straightaway!
For discolouration I recommend clinique 'even better brightening mask'. Use 3 times a week and it really makes a difference. Pricey and someone may be able to recommend a cheaper version of the same kind of product. Are you concerned about redness at all? If so, don't use an exfoliator scrub!
Nigellas both - I have dark, discoloured spots and these are growing in number, mainly on my jaw line - like bits of tan that haven't faded. I also am red across my cheeks. I dry out easily on them though, even though I am oiler on my nose/forehead.
I am lined on my forehead and, thanks to the dreaded swimming goggles, am quite puffy around my eyes.
sorry to hear about the fibro, is that a bit like CFS, which i have?
The dark spots are probably pigmentation from sun exposure - do they fade a little in winter and become more pronounced in the sun? Sunblock is a must, to stop them getting worse. There are various lotions and potions that claim to fade them, but I don't think any of them work but that's just my opinion. Others might have some recommendations? the only thing that actually works is IPL which is expensive and has to be done in a clinic with someone qualified to do it properly.
For the redness/dryness, have a think about balms and oils. They do not make your skin oilier BTW! It feels a bit counter-intuitive but honestly works really well. I have a couple of recommendations (see below) but they aren't cheap - perhaps someone else has budget recommendations?