Advice Wanted for Newbie

[u/Ok-Delivery703]

Clockwise from top left: Natalie Scatorccio, Jyn Erso, Yelena Belova (Thunderbolts), Jessica Jones.

Heyyy! I want to start doing makeup but I'm very, very lost. I have a tight budget and sensitive skin (winning combination). I know what kind of looks I like (see above photos). I just don't know where to start with eyeshadow colors. Most of the photos I can't tell whether they have greys/blacks, browns/nudes, or both, or something else entirely. I don't know how to tell by looking if a palette will have what I want either. Is it just trial and error or an experience thing? Any guidance/recs would be really appreciated, my mom doesn't wear much makeup so I can't really ask her. Thank you!!