Month 1:
Well 1st I get really depressed and probably just lay in the corner for a week. Then I'd go find a suit, a sledgehammer and some dry wall, entertain myself. Build a massive fire. Learn Italian. Find a sustainable power source and possibly finish programming that AI I've been working on so I have some company.
Month 2:
After this I'd find my old chemistry teachers house, find her dirty laundry and do... thing, find a gun and hunt pigeons, obtain more women's under garments and a metric fuck ton of porn.
Month 3:
Realise I could live in any house I chose, move to the mansion about 30 minutes away from my house, obtain fancy things, make a home.
Month 4:
Find a way to make my AI self aware, give it some form of body and do several creepy things to it.
And likely continue just playing video games, watching movies, reading books and wanking into my old chemistry teachers panties for all eternity. Oh, yes and I'd kill that fucking goose!