I'm a 2nd year maths student that doesn't quite understand the content

I did okay in first year actually, but this was mainly because I was doing past papers so I gained some familiarity of older questions without truly understanding a lot of the content. I'm so scared for the 2nd/3rd year because I know that if I don't start understanding this stuff... I could be really screwed.

Any tips for actually understanding the content? (Mainly calculus and computing modules)

The foundation of calculus is analysis, so I suggest you learn non-standard analysis, that is, a system which allows the use of infinitely large and small numbers by extending the real numbers to form the hyperreal numbers.

I would suggest reading the book "How to think about Analysis" by Lara Alcock which will give you a really solid foundation for Calculus and will literally open your mind to how maths is studied at university. You'll be able to apply the general techniques learnt from that book to other modules. And if you're still not satisfied, buy her other book "How to study for a Mathematics degree" which is similar but it applies more generally to other areas of maths you might struggle with.

I'm also a 2nd year maths student, and these books definitely saved my life and made me actually enjoy my degree because now I know I can understand it, I just have to go about learning it in a different way and keep at it.

Thank you! I will take a look at these books, should've done this a year ago but better late than never!

I would suggest reading the book "How to think about Analysis" by Lara Alcock which will give you a really solid foundation for Calculus and will literally open your mind to how maths is studied at university. You'll be able to apply the general techniques learnt from that book to other modules. And if you're still not satisfied, buy her other book "How to study for a Mathematics degree" which is similar but it applies more generally to other areas of maths you might struggle with.

I'm also a 2nd year maths student, and these books definitely saved my life and made me actually enjoy my degree because now I know I can understand it, I just have to go about learning it in a different way and keep at it.