[Skeleton]

If it's your first time, I wouldn't suggest going over the top with it. You'll be able to feel yourself getting tipsy and then drunk so whenever you feel yourself getting that way, I'd suggest stopping because as said, you don't want to overdo it especially when you don't know your limits. Stick to a few drinks and try to space them out so that you aren't drinking quickly which will get you drunk faster.

As for sobering up, I'd said food and water is the way to go. Have something simple, like toast or bread maybe and drink plenty of water and it should help you sober up. As for returning home, it all depends on how much drink, if you stick to only a few, you should be fine but as said, water will help sober you up a bit so maybe when it's close to leaving, switch to water/soft drinks.

Hope I helped. :]