How do I make my move?

a while ago I told you guys about a girl that I like, we smile at each other
a lot and she always says hi and smiles to me when we see each other in
the hallway. anyways, she pays attention to me and the people who replied to
my previous post said that she likes me. so ho do I make my move? I am
very bad at this kind of stuff

Approach her and ask for her name even if you already know it. Ask her what she likes to do on her time off. Ask about her. Like where does she live where is she from. But talk to her like you two are having a conversation. Let her know things about you too. I'm sure if she has questions too, you won't be put on the spot by having to do all the talking/asking.