Great plus to your prep

I think Gmatclub tests are a great leveler.
They will put you at your ability level in quant.
So take a GMatclub test (full length) (you can ignore the verbal in my opinion) and see where you are in your prep. My advice is to take a gmatprep in the beginning and use Gmatclub quizzes as you prepare to solidify concepts once you have learned them by watching a video or on a blog. Use the categorization by level (500, 600,700) of questions in quizzes and take it step by step. The quality of questions is good and i feel gmac would test you on some of the tricky applications of concepts that are required in gmatclub tests. However u don't need to take them all but I think break it down topic-wise ( there are posts which detail what type of questions by topic are more challenging, appear frequently. One post by magoosh has the frequency of all quant topics in all gmac materials in an excel sheet. So challenge yourself with gmatclub tests, use Bunuel's and KarishmaVertasprep's explanations to the questions even the ones you get right so that their approach is understood. and keep it chill because you will have easy questions as well. Apart from the tests. don't forgot to check out Bunuel's popular posts and his tricky question explanations specially in number systems they really clear up tough ideas. Go through the entire website and use gmatclub tests for a consolidated question bank that tests you effectively and on the basis of your level if you chose to segregate the questions. It's a great addition to the prep.