They are basic enough once you learn them and they also are a whole third of the paper. So I would make sure to learn what you can. They are very repetitive so it should be fine. It looks like a lot but its not too bad, you don't need to learn them all at the same time there is still months until the LC.
there will be a mechanics, optics, and sound/magnetism/waves one for sure.
electronics is uneccessary if you'r rlly struggling, plus they wouldnt ask 2 from electriciity bc theyre all similar. So you might only have 1 on the ppaer, and from now it's like 3/5 instead of 3/4