I can answer the COT question. That schedule is just a Guideline. lol. Depending on the day, you generally have to be dressed and ready and formed up by 0445. Wake up is no earlier than 0430. Now you try to get 2 people into 1 bathroom, get your hair up properly (or shave for men), in 10 minutes! lol. We all cheated and broke the rules and set our alarms for 4am and dressed in the dark so they wouldn't see our lights on. After the days scheduled events, you are not done. There are meetings and projects to get done. Lights out is at 2330. We rushed to get to be by then, and often read/studied by flashlights. Weekends you are off unless your flight has activities. But you are still on lockdown in the dorms. We slept then.
The HPSP scholarships were all med students in my COT class. They did COT and then back to school. they get paid during their education years and then owe the military time. It's a great program. But when your done and ready to serve, it'll have been years since COT and it would be a difficult transition I think. My 2cents.