Hi Vernhart, this is a topic near and dear to my heart! The volume of material in med school can be super overwhelming, and it's important to prioritize in order to make things manageable.
First, in regards to your comment about lecture being a waste of time and mandatory. To me, there's a problem in that sentence already. Who can afford to waste time in med school? You need to figure out a way to make lecture worth your time. I have this whole 5-step study strategy that I teach and part of it is that you have to do pre-reading so that lecture is reinforcing material rather than introducing it. If you do that, then when professors are reading off the powerpoint, your attention will automatically be focused on things that are high-yield and things that are new to YOU so that you are actually learning something during that lecture.
In medical school anatomy, I think there is some gamesmanship and a little love. One of the things I teach on my site is "Learn to Love Latin." It's the idea that if you can enjoy learning the word roots, the anatomical terms become easier to remember, and also by using the linguistic part of your brain you are recruiting different neurons and helping to facilitate learning. The gamesmanship is that you need to study things that are testable. This all depends on how your school does testing but in general you can try to focus on things that are easy to pin during a lab practical, anatomy that has clinical application, or information that you've seen in practice questions (if you don't have a practice question bank, try to find one). I have an "Anatomy Tip Sheet" if you are interested, with some ideas for surviving anatomy and it has a link to some practice questions. Anatomy is a beast but the good news is that there are lots of tricks and tools out there to help you.
Beyond anatomy, the key in med school is that you have to find ways to reduce the volume. This is much easier said than done. You can start by separating low-yield from high-yield and coming up with an efficient study strategy. Also, try to stay flexible. You may need to try a few different study strategies. If you are feeling overwhelmed, take a deep breath and then take a break - give yourself permission to try a new method of studying that might be more efficient. Anyway I could go on for hours about this, but I'll just stop here, hopefully some of these tips might be useful.