u/Jumpy-Inspection-837

I know that gmat has 3 sections and you need a very good score to crack good colleges .
Can someone please help me with few questions

1. Which study material should I use and where will I get it from . I’m okay to take coaching but it should be pre recorded videos and good material
2. How many months are required on an average as I’m a working professional
3. Should I study the subject or give mocks and practise like how do we go about it
   And lastly do I have to register on mba.com or something
   Please explain me the entire process when will I get results when should I register and stuff
   Some noble souls please explain