If anything, my advice as a freshly graduated Biochem major. You could try and work on memorizing and being able to draw the amino acids. Knowing their 1 and 3 letter codes. Know Pkas and how the specific amino acids will be affected if placed in acid or base or neutral solutions.
Depending on your course, what worked for me was drawing everything out. I wrote out all the pathways and tried to connect them together. So I had a huge page of pathways with everything interconnected. It helps out things into perspective and makes it bigger picture.
It’s tough to go ahead and start learning things before being thrown in. But the amino acids will put you ahead by a little bit. Since they’re the building block of biochemistry. Good luck! Biochem is super fun and interesting!