I think you should move on to the next lessons. You can always practice identifying the conclusion in other arguments throughout the course and maybe when you come back to main point questions you'll notice improvements. You'll get a chance to learn…
I study at the library and I found that most libraries have a small section for lsat prep books. You could use the questions in there to practice or photocopy/take a pic of the pages. And of course, make sure to go with the companies that use real l…