1. Place your hands on the guitar.
2. Pick it up
3. Strap it on
4. Lift it above your head
5. Play whatever it is you're trying to show off to your friends
As what loldude said, you just have to put your guitar behinf your neck and then play, what i reccomend you do is that you do some neck and triceps stretches first. Easier to reach for the notes closer to the nuts.