ya man its pretty easy to "hold your weed" haha or whatever you want to call it. i was just really excited the first time i got high. i was with my homies and we just laughed it up and chilled. just let the high do its business. just chill back and relax, enjoy it.
there is a possibility you may not get high tho, some people say you dont get high your first time. not for me though!
just act yourself dude, no one can persecute you for that! if ur chill with these guys, it will all be fine. just dont be afraid of your newbie status. everyone has to start sometime!