Then you need precalculus honors for calculus, right?
The trick is practice - use Kahn academy (try to solve each problem yourself and see how they got to the solution, erase what you did wrong then try to do it o again your own; wait a day, see if it still makes sense and you can still do it.) Doing this with your teacher’s help (show them your preparatory work) and with a tutor, then trying again on your own, would help most at first.
Start looking at all the jobs in the medical field- especially NP and PA. Most students only know “physician” and don’t realize there are super interesting, well-paid medical jobs that combine science and people skills that don’t require 12 further years of schooling. 