I'm gonna assume I'm in Ponyville, so I guess I'd head to Sugarcube Corner and look for Pinkie Pie. She'd likely be willing to show me around.
As I wake up I find myself laying on the all too green grass, try to get up only to fall on my face for the fact that I have hooves now. Once I realize this my mind explodes and I try to get up. This is hard because of the entirely new body however I get used to it eventually and go and attemp to get some barings. I find myself in ponyville minutes later and go to sugarcube corner in search of Pinks because I knew that is the best way to have a party thrown in my face and be able to meet everypony.