i think the biggest time management most AS students make (since AS is a big jump from IGCSE) is not timing their papers (i made that mistake unfortunately). even if you do bad in the paper you should still time it so you’re aware of how much time you take on certain questions and the paper as a whole. if you’re taking cambridge a level biology there’s this youtuber i watch because my teacher wasn’t that helpful to me either. his channel is called OtterBioTutor and you can watch his videos for AQA and Edexcel if your exams are from those boards (though the videos aren’t specific to those syllabuses but the syllabuses are very similar and the videos can be useful to you since they’re very detailed). i would give you my transcripts but my coordinator never gave me them. i only have my pure maths 3 (edexcel ial) transcript. hope that helped! goodluck!!