I am 14 and currently in year 10 (uk). I am very interested in maths and intend to pursue it. I currently can do C1, C2, C3 and parts of C4 edexcel exam board a level mathematics. However, when i learn something new i have trouble truly remembering it and this is the same for the a level maths i have done. I have used a variety of resources up to now including khan academy, mit open courseware for calculus and quite a few more including the edexcel textbooks which i find awkward to use. I would appreciate a suggested order to learn each topic from beginning a levels to end of bachelors degree and also i would appreciate good resources or books to use. The reason i wish for resources to a level basics is because i would like to relearn it so ensure it is safe in my mind.
Thanks in advance.