I am a fourth year math student. If I go back and could give myself an advice that will motivate me the most will be: those stuff that you learn in first and second year, pause, will REAPPEAR in your third and fourth year - in a waaaaaaaay more confusing form of mutation. If you don't make yourself familiar with those topics at heart right now, you will dread your future studies. Like me, I still dread whenever Taylor series comes up in my textbook and it comes out A LOT. Make sure that you have the basics drilled into your brain so that you can continue learning.
Like Taylor series, calculus and algebra, in first and second year, just merely looks like a bag of dry, meaningless tricks that you are tested on. However, they are our ancestors' wisdom to solve problems that is not straightforward, if not impossible to solve. They can make impossible possible.