I'm a US citizen, I want to petition my 11-yrs. old adopted daughter. Adopted since birth but can only see her once every year.

She is studying back home outside US and have somebody taking care of her. Tried to petition her 5+ yrs. ago without a lawyer but immigration is asking me for a proof that I've been with her physically for at least 2-yrs. I am working here and cannot afford to quit my job. What is the best way for me to proceed?