one thing i WISH we were told as young trans men and transmasc people when trying to pass as cis men irl is that, unless youre good at doing it very very subtly and youre using it very sparingly, face makeup will not masculinize you. the reason is if youre wearing makeup, people in real life can tell youre wearing makeup. its visible in the texture it leaves on your skin, and its especially visible because most ‘masculinizing’ makeup is heavy contour, which is quite obvious in real life! and if people can tell youre wearing makeup, thats a point towards reading you as a woman, because its assumed that makeup is worn by women.
its possible people will be able to tell youre trying to look more masc, and it might make them clock you as trans, but its very unlikely to help you pass as a cis man. a lot of the tips youll find for this kind of makeup is from people who are NOT trying to genuinely pass as cis men - cosplayers or drag kings, for example. this is because their makeup is used as a costume, or its meant for photos. this kind of makeup will work well in pictures and if you just want to take more masc selfies and stuff its a good idea. in real life its probably not going to help unless youre making it very subtle.
disclaimer again that this is for if youre trying to be read as a cis man. if that kind of makeup makes you feel good about yourself or alleviates dysphoria or is a way you express your gender, awesome! but if youre using it because youre expecting specific results wrt your passing and how youre read in real life, just be aware that its unlikely to yield the results youre looking for.
the tips that i found were actually useful when i was pre-t were using eyeshadow to deepen to eyebags or give you more sunken eyes (again, subtly - its not as obvious as contour!), using mascara on your eyebrows as well as on the hair on your temples if you have any (sparingly, and trying to avoid clumps, which are also visible), and maybe a light amount of contouring under the jaw (which is not obvious and does not attract attention like face contouring does).