I recently heard from a student that taking one of our classes really helped him do his coursework throughout college; so, great question! I would recommend either of the following:
There are a number of differences, but most importantly, 318 is a 1-unit, 8-week course, and LIBR 325 is 3 units and the whole term, so 325 is a larger commitment and you'll go deeper and broader. But 318 is also a great way to get started. Good luck and I hope you get a great schedule for next semester.