I have watched all the videos, from 1 month plan and completed the practice and hw questions alongside. I have my test in a month. I want to start solving the big book. My question is should I take the tests in a timed manner including quant? Like the TC, RC, and Quant sections?
Also where to access the solutions from? I really want solutions streamlined in either video format or written format for each question so that I can see if I am going right or wrong.
It depends if your Foundation and Strategy are already good. Then only you should do timed practice.
You can use the answer key at the end. There are no solution guides right now. You need to post your doubts here on the forums or search for the question on google to find a discussion on a website like GRE Prep Club.