I have had Rosacea since my early twenties, about 25 years. I have found that whilst specific products help more than others, it's also important to stick to a regular skincare routine. Ideally cleanse and moisturise day and night. Oils are particularly good for my thirsty skin. I avoid all but the most gentle toners.
Products that are good for me and I recommend;
Cleansers - 'Kalme' cream cleanser for anti redness. Can be removed with cotton wool, so handy for travelling/camping. Really good for Rosacea. Helps get flare ups under control.
I find cleansing balms really good too, wiped off with a wet warm fluffy mitt. My favourites are Jane Scrivner and Emma Hardie. I used to have a Superdrug gentle oat based cream cleanser that was cheap but effective. It doesn't have to be expensive to work!
I occasionally use toner, Liz Earle is nice and gentle.
To moisturise I find oils gentle and absorb better. My favourites are Sarah Chapman Skinesis overnight facial (quite an expensive treat!) Emma Hardie's is good. I find most oils work to be honest and I have about 4 on the go at the moment.
I also find it helps to use a tinted moisturiser or light foundation. It seems to protect my skin through the day and keeps my Rosacea at bay. Although this might be better to try when your skin is a bit calmer.
Useful product is 'Kalme' chameleon concealer. It's a green liquid that is miraculous for evening out redness. It literally disappears before your eyes!
Try not to touch or pick at your face. Diet plays a part, unfortunately my triggers are beer and wine. I also take 'accumax' skin capsules and I think they help.
If you try one product from my suggestions, I think the 'Kalme' cleanser and concealer are fairly reasonable and very good to get it under control. (I'm not a fan of their moisturiser though.) Once it's under control I think you open up to being able to use many more products. I am working my way through the M&S beauty advent calendar and nothing has upset my skin because it's more robust now.
Didn't mean to write so much but I hope it helps!