What do i do with my tongue when making out?

Ok so what do I do with my tongue? Also how will I know when he's going to try to slip his tongue? I'm soo confused about what to do with my tongue and I like having and idea of how to do stuff before I do it.

You will know when he does. IM sure youll start of with small kisses but when he opens his mouth a little more most likely hes gona use his tongue. More or less its like your tryning to play with his tongue whit yours. Its really not complicated and the more you worry the more youll feel uncomfortable! Im the same way with having an idea and being prepared for things, it makes total sense to be.