I have no idea how to flirt

Ok sooo I’m sixteen and absolutely suck at flirting. I don’t know how to approach guys. Well theres this kid named nick and I have a crush on him. I have never really had a conversation with him and am not sure how to. I found out last week I’ve talked to him on snap before asking for his friends snap and that was about it. I “accidentally” sent him a streak to start convo but he didn’t even reply 😂😂😭💀. So I asked him today what we did in class and he just replied with group stuff. I kinda wanna approach him in school but I’m not sure how to.