i need help and advice please

hi all im really lost on where to go im looking emigrate to the usa

to be with my girlfriend

and i have no idea where to even start im going over next year for 4 weeks

but i understand i need a greencard or i cant work

so any help and advice on what i need to do to get the ball rolling on this
would be great

here is some info on me

im 34
uk citizen i was born here

im self employed trying to get my own biz up and running

hope that helps
thank you for any advice

Visas > Immigrants to the U.S.

thank you for the link