- When you find a cocktail of meds that works for you. How likely is it that you will stay "normal"/stable forever or many years? Will a person still have the extreme highs and lows?
It is different for everyone. For example, I had my first diagnosis around your age and I tried meds and then decided my dr. was stupid and weaned off them and lived semi-normally for 10 years before another significant episode.

- Can a person with bipolar 2 live a completely "normal" life, just like everyone else? With a career and family?
Yes, while I don't currently have a career, I do have a family with 3 kids. You might take care to chose a profession that isn't extremely stressful as that can trigger an episode.

- Does everybody get back to "normal" after a depression, I mean when it comes to "brain activity"? Right now I have problems reading, spelling, concentration and so on.
Everyone is different. Unfortunately, the problems you describe occur on meds for me, but you can learn coping skills. I wrote everything down because I was super forgetful on the first meds I tried.
- Do a person with bipolar need to take special things in consideration? When it comes to job/career, working hours/times, sleep and so on?
I think it would be wise to do so. Sleep is definitely important.

The other questions you asked regarding your coursework, I will tell you a bit of my story.

I was also a straight A student and in college when I had my first episode and diagnosis. It was a really stressful time and I was taking 3 summer classes, so they were more intense. I ended up dropping one because I couldn't keep up. Since you already paid for it, I say finish it as best you can, don't stress too hard. Then you can retake it for a better grade (right?). The following fall I was still trying to work the meds and I actually talked to my professors about it, not specifics, but just that I was trying to sort stuff out. Though I was majoring in special ed. so my teachers were really understanding of it, maybe more than others would be. Anyway, maybe there is a learning center or some accommodations your professors can make if you ask.

Hope that helps. I am trying to look at all the strengths I get from my bipolar: empathy, energy/super abilities when manic...