BMW X7 problems and issues

Immediately after buying my BMW X7 g07, I had a road accident after that my car haven't been running the same. I wanted a repair manual for complete guide so my friend suggested me to buy from https://bmwmanualspro.com/ , though the manual is comprehensive and over 10000 pages, I am unable to fix the car. I need a good mechanic who know how to read the manual and wishes to help me with my car.