So, you ask a really good question. I don’t think you need to be worried about how much time you are spending learning versus doing practice questions. Rather, you need to ensure that you are doing enough practice questions to gain mastery after learning a particular topic. For example, if you are learning about Number Properties, you should develop as much conceptual knowledge about Number Properties as possible. In other words, your goal will be to completely understand properties of factorials, perfect squares, quadratic patterns, LCM, GCF, units digit patterns, divisibility, and remainders, to name a few concepts. After carefully reviewing the conceptual underpinnings of how to answer Number Properties questions, practice by answering 50 or more questions just from Number Properties. As you do such practice, do a thorough analysis of each question that you don't get right. If you got a remainder question wrong, ask yourself why. Did you make a careless mistake? Did you not properly apply the remainder formula? Was there a concept you did not understand in the question? By carefully analyzing your mistakes, you will be able to efficiently fix your weaknesses and in turn improve your GMAT quant skills. If you are studying in this way, you will organically spend as much time as you need learning and practicing. Thus, don’t limit yourself; just work at your own pace and focus on learning and mastering the material.
You also may find it helpful to read this article about
The Phases of Preparing for the GMAT.
Good luck!
Feel free to reach out with further questions. Good luck!