There’s something you could try: immediately after going through a batch of lessons, use the self study script to go through the new items a couple of times until you can answer each question quickly.
You can set it up so that it only quizzes you on the items that you just learned.
Essentially what this does is reinforce the new items in your short term memory, which will be really helpful for getting them up to guru+ with high accuracy.
I’ve done this a couple of times when I feel like the mnemonic doesn’t stick for example. Maybe it’ll be helpful for you too?