I would drop this life in our world for a new beginning in Equestria in a heartbeat. Ill answer the questions you provided below.
1. 100% of the knowlage you learned of the show has hapened and is 100% accurate, how-ever fan-fics and other non-official material may not me entirely true how ever some material may be close to or accurate to events in equestrian
That's fine I wouldn't have it any other way.
3. No-one in the human world will know your gone, it will be like you never existed there in the first place
That's also great I wouldn't want any of the few people I know to be sad about me being gone.
4. You get to choose everything about your self before you become a pony and enter equestria (Age, Sex, Color, Pony type (earth, Pegasus, unicorn), Sexual Preference, Whether or not you have knowledge of being human ect.)
Pegasus, in human years I guess so 22, Male, straight, colors would be Dark Purple, Royal blue and Sky Blue, I can go with or without my human knowledge it doesn't matter to me.
5. If you have a talent in the human world (art, music, sport ect.) you will have a cutie mark of the appropriate field, how-ever if you still haven't found your talent you will be a blank flank and will have to find your cutie mark as a pony.
I don't have any spectacular talents other than I enjoy star gazing and learning about the universe. So idk if id have a cutie mark in that or not.
6. There's no going back.
I'm completely fine with that, I don't feel like this world needs me.