Hi,
What I found most useful was consolidating notes after every lesson and keeping up on flashcards. Many of my teachers told us to rewrite our notes up neatly but I actually found it more useful to just use the time to make flashcards or revision posters and then you can keep going over the flashcards to keep up on the topics, I never looked at my notes tbf.
But honestly don’t stress too much about falling behind, there is a big jump in the amount of content but if you keep up on the work, you’ll be fine. Try and get into a routine and experiment to what revision technique works best for you because finding the most useful technique now will be so much more beneficial for when exam period starts.
Hope this helps ☺️