It does take a lot of time and work at points, but it really isn't that bad. The further along you get, the easier things become. Going over the book would help. One thing that helped me (assuming your class works the same) is don't worry about taking notes in class. You have a lot of information coming pretty quickly in that time and after the first day I realized there was no way I could keep up. If the power points are the same information from the book, bring your book and a highlighter and just follow along highlighting the important stuff. Made it a lot easier for me to find the main ideas later quickly and then I could read the surrounding stuff I didn't highlight to get the supplementary info when studying on my own time. I'd also say don't get the cheapest stethoscope you can find. I bought a mid level Littman and it was great. The one time I had to use a POS one from school was awful, I couldn't hear nearly as well as I could with my own. And when trying to learn how to properly do all that, I kind of liked being able to clearly hear what I was looking for.
Other than that, don't sweat it. It really isn't that hard if you put in the work. And don't psych yourself out over assessments. If you know your stuff, be confident, show what you know, and go out balls swinging. If not, then you need to fail so you can be shown where you can improve. That can all be summed up to care about what you are learning and being proficient at it though.