Easiest way for the first kiss is just to ask the other person ,,May I kiss you?,, ... The other person will assume the position , with lips forward if they want to be kissed on the lips, or with their cheek slightly facing you if they will accept a cheek-kiss.

It is that bloody simple. If the other person likes you, and you like them, either of you should not be "oh my god I don,t like you anymore" when the question arises

"May I kiss you?"