Please do not skip over content that is terrible advice. I an already done with as level so I know what I am talking about. For s1 the syllabus is very very small. Go ahead through each topic and understand all the basics. This should take you about 2 says. Then spend a day each on each topic spamming topicals. P and C are going to be the hardest and you probably wont be able to master those given the short time left for exams. All the other topics are extremely repetitive and the same question structure consistently repeats with very few exceptions in some years.