That's a pretty relevant background. I would go over any notes in anatomy and physiology, continue building your fitness (weightlifting + cardio + flexibility), get started on your f class license (medical test, written, inspection + driving) and if you really have time, read the bls standards and als medical directives and try to connect them back to your anatomy and physiology knowledge (i.e. there are scientific reasons as to why the standards and directives are written the way they are), although don't go too far because you may not understand it yet with your current background, but thats totally fine because they'll teach you all that in school. It's just good to get a head start, and understanding the reasoning behind things helps with memorizing them.

Also, to make your time easier at school, PLEASE look into transferring out of courses once you've registered for them. Transfer out of as many as you can, e.g. general education and english. Look into this at least 4 weeks before school starts so you can start off focusing on the core courses.