definitely do all of the assignment questions and thoroughly understand how to do each one! I found assignments to be super similar to the test questions. Personally for the first test, I did a bunch of textbook questions for specific areas where I thought I was struggling, but only because it had been such a long time since I had done any sort of math (aka i didn't know how to graph anything

). When you do get to the test, read the multiple choice and true false VERY carefully. I remember after the first test there was a ton of complaining abt people getting either mc or t/f wrong and losing 2-3 points off the test (one wrong multiple choice = 7% off your final test grade. brutal, i know)
I didn't find the first test too hard, but I know lots of people that didn't study enough because they thought this was all just high school review. They ended up not doing well at all, so just practice a bunch till transformations and everything else become second nature! The content on this first test also creates the foundation for the rest of the course so if there's anything you want to know really well, it's this stuff
Good luck and don't be too nervous!