Hi
Suhrobbek ,
Welcome to GMATClub

I like the idea of preparing for GMAT early because this will provide you ample opportunities to improve.
To start with, go ahead and give the first GMATPrep Official Mock (you can download the same from
www.mba.com)
Once done, determine the weakness and start working on them.
If you are saying you are facing issues in Verbal, I would suggest learn the basics of GMAT verbal first and then practice strategically.
You can read the stories full of non natives on how people improved their verbal scores. (You can read mine down there on my signature).
If you take every step very carefully and drill down your weaknesses, you will improve very soon.
All the best.