I second the Ken Webb books. They answer dot points chapter by chapter, provide summary diagrams, provide historiography and essay plans. Best textbooks imo.
https://www.youtube.com/playlist?list=PL06kSDT9aNLOQnmlRIjtIXsoYMrBMczH-
I found this a while ago. Don't know how useful it is as I've only looked at the ones about external stability.
You're welcome. If you need more help it may be beneficial to talk to your year adviser or the head teachers of the relevant faculties. Sometimes they can help you make up your mind.
Well hello there,
I had the same dilemma as you at the start of this year. Biology, for me, was the easier subject and had a more doable workload. Even so, the ineffectiveness of the teacher's teaching methods meant that I solely had to learn everything at home and the work started to pile up...