The above isn’t really an answer, what you should do is take notes from the lessons, review your notes at regular intervals, and if possibly try to associate the information with something else, like an image in your head or a short story of a couple words.
The review intervals should be as such:
10 minutes
1 day
4 days
12 days
1 month
And then it should have entered your long term memory, or rather, You’ll have a hard time forgetting it. Especially if you visualize every time you read through your notes.
