So basic makeup skills can be learned a few ways. A lot of people swear by tutorials like on YouTube/tiktok/wherever, but I never did. Alternatively or additionally look at communities like makeupaddiction on reddit and when you like something seriously look at what they did in order to do it. You'll start to notice techniques that you can adapt for your own purposes.

Practice is going to be the most important thing, just try it out on nights you're staying in (there's a faction of us who learned while recovering from bottom surgery for that reason).

And in that vein, learning what looks good on you will involve learning what colors work with you. I looked awful in the first lipstick I tried because I went with something moderate and ordinary. However with my skin, hair, and eye colors if I'm not going subdued (at which point I personally don't wear any makeup because my face is plenty fine as is, yes I did read a lot of feminism while transitioning), then I'm better off going with dark colors, including lip shades that I've had to give cis women courage to try.

So yeah, trial and error, if you've got any specific questions though I'm happy to share some of what I've learned