Help me with my Calculus journey with Computer Science( diploma)

As my Diploma in Computer Science approach I who has not much of a maths background besides core math have found Calculus to a bit more complicated than discrete maths.

So during last month which was Sem break I just did questions solving only... looking up A levels Maths papers and stuff like that and trying to find the answer without any previous knowledge it did help me understand the basics... but crazy formulas and differentiations do not make sense to me during the video watch as there's like a gazilion formulas.

So I had problems with actually trying to find the solution if those formulas and they all have like their seperate stuff like differentiation and stuff like that... and I had problems really answering cause it is all a case by case issue. I might be missing some fundamentals I thought... but at least why can't it be like Pythagoras Theorem you can literally just flip the thing and you will have the next formula.

I do Enjoy Maths but I really suck at learning so I need tips and stuff to hopefully get A+ or something. and I really do compars myself to other classmates I know it's a really bad thing but when I do see them not studying I feel like Im stupid.