First time eh?
Here's what you need to do:
Disconnect all electrical appliances. Remove all pets. Turn off the gas and water to your house. Stop all mail and newspaper deliveries. Put 9-1-1 on speed dial. Have oxygen and a heart defibullater handy. Strap yourself into a sturdy chair. Sit on a towel in case you soil yourself. Put your feet in a pail of water in case you catch on fire. Under NO circumstance should you put on a Superman costume, stand next to a window and say "hey look what I can do".
Or--
have a few friends over, put on some tasty tunes and have the beverage of your choice in the fridge.
Or if you live with people you don't particulary like, go hiking with a few friends and sit by the side of a cool mountain spring.
Someplace low-stress. Have a few experienced tokers there.
Prepare to have a sore stomach the next day because you'll laugh SO FREAKING HARD.
It will be one of the most pleasent experiences of your life, like having sex for the first time, except you don't have to go to church the next day to pray for the lord's mercy you **** (j/k).