What should i change now that were toghter hlp please?

Okay now i was apparently going out with this kid since the first but i finally found out today that he was what i really wanted and I barely know the kid and i have a connection with him and i think i really like him and i'm going to hang out with him today and i am a pretty "chill" person but i don't know how to be around him... as a girlfriend ? should I change in any way since were going out ?