All through High School I was in the Honors Program. I took AP Bio, got 1240 on the SAT, got a bunch of credit heading into college etc.
So naturally I thought I was the shit, and so did the guidance counselor who signed me up for Bio, Chem, Labs, and Math first semester.
Beginning Sophomore year I became a business major!
I would recommend taking one to two difficult classes at a time. Even one is ok. I don’t know why people want to graduate college so quickly, it’s a once in a lifetime experience, relish it while you can.
My recommendation always is, take one hard class and fill the rest of your schedule with at least one that you enjoy just for you, and the other prereqs your college is going to make you take. That way you can ace that class.
You will probably love college. If you did (like me), you would also stay in the summer sessions. I always used the summer session to take the difficult class that I really wanted to focus on. Taking one to two classes per summer is GREAT! You get to focus on a difficult class, AND still have most of your day to spend with friends etc.
Doing this, I was going to graduate on time, but I didn’t want to, so I took only 3 classes total per semester and one over summer. Senior year, I only had to take two classes per semester. This enabled me to get another year of college, and really focus on my classes, as well as join a business fraternity, and have a part time job, AND lounge around and just soak up the experience, all without having to really sweat it.
If you have to take two classes together, take them. But using my method, you can really excel in college and do what you want to.
I’m sure you will do great in science, but this method also allows you to change majors, IF you decide that after a year of college, biology isn’t what you want to spend your whole life doing. Otherwise, if you wanted to switch, you’d have to start completely over b/c you packed in so much science at once (assuming constant semesters like with curriculum like you mentioned).
There is NO rush. College is so much more than just classes. Give yourself the time to experience that.