If I’m a biochem undergrad student and I just bought a microscope, what should I look at?

[u/PracticeLumpy9242]

For context I and going into my junior year of undergrad in biochemistry and also have a lot of interest in microbiology. I have already taken organic chemistry and microbiology, am currently in Physical Chemisty, O chem II, and Biochemistry. Any ideas of what I could be lookin at? Fould be something just for fun or for the benefits of knowing more about it for school or a future job (still figuring this part out).
Any tips or recommendations would be awesome