You are welcome! Focusing on school and making it a priority will do wonders for your GPA. These classes have their own challenges, but if you approach them the right way and with the mindset you will see that they are not nearly as horrendous as you might think.
Being interactive also has the added advantage of having your professor see that you're trying. Go to their office hours if you need to or even to just chat about life. You may need a Letter or Recommendation for outside nursing programs
or scholarships. Come grading time, I truly believe many professors tend to give favor to students that they are familiar with (who they know are trying to succeed) who may have a grade on the edge of another.
We have the same home campus! I did take Psych 9 over the summer through an online professor at Norco though. The classes do get quite full quickly. If you still need General Education courses or anything, consider joining the Honors Program. You get priority registration which helps out tremendously. I just finished the amount of classes needed to complete the program, but I fear it has no bearing on the nursing program (it could look good for transferring though).
Off the top of my head... for Bio look at cellular organization (atoms make up molecules which make up organelles, etc.), osmosis, diffusion, etc. and for chemistry focus on the components of an atom (protons, neutrons, electrons). Stuff like that. I do not think we looked at calculations at all.