I was in a situation last year with Jaimini Sutram, where I was watching every video twice, but unable to grasp a word. At that time I gave it up and started studying Predictive 2.
Came back to JS several months later. By then somehow I could understand every single word Sir was saying. Maybe the interim practice on rashi predictions/blank charts had helped. Only thing that I needed to improve on is Ketu.

So some suggestions based on my experience:
1. Follow the ‘litmus test’ suggested in class 1 to know whether JS is meant for you or not.
2. If yes, then do the remedies provided in JS class1 intro.
3. As Sir has told, crazy activations will happen during the course since it is a Scorpio based classic. In my case, I had two interruptions. After the 2nd one, I restarted it again with a do or die attitude. At that point maybe Rishi took pity on me and gave a nimit.
4. Based on the Nimit, I bought Ganesh Puran and read it. After that, Ganpati Bappa opened doors for me and finally I could complete the navansh series.

Hope this helps. Jai Sri Ganesh.