First kiss/make out

I'm 14 and I've only kissed one guy, it was more an awkward peck kinda thing. Haha but I'm talking to a guy (16) and I really like him and I think we're headed in the right direction ☺️ but I'm just so nervous to kiss him.. More make out with him.. I don't know what to do or what to expect with the while tongue thing :/