How to know if im studying correctly or not?

I've been using the videos for about a month, and I wanted to take the April LSAT. I have gotten the same score (mid 140s) on three different practice tests. I cannot finish a section on time, nor do I feel like I am fully grasping the concept. Are there features I'm not using, or should I just focus on drilling? Please help. I feel so discouraged!!!!!