I’m so happy but I still need help

Ok so I spoke to my crush today he works at this store I go to all the time so I talked to him while I was checking out (btw I’m 15) and I don’t know what got into me I don’t know what boosted my confidence but I asked him to see if he had and Instagram he said he didn’t but he had a Snapchat that he doesn’t post on all the time but we started talking for about 1 minute until somebody came up behind me about to checkout so I need help on how to ask and flirt and help me boost my confidence a little bit more please ❤️ (and if not flirting I just wanna be friends and help me to make friends)