Nursing isn't as intense as biochemistry, that's for sure.
I'm not you, but my advice would be to get wherever you want to go as quick as you can. Time is money, within reason. If you can get into PA school quicker than it would take to become a nurse, do that. Nursing is a good job, but a terrible career. It's getting so regimented and micromanaged that anyone with any amount of ambition gets out as soon as they can. I wish I had done NP school as soon as I got my RN and my first RN job. Now that new hospital requirements for nurses are kicking in, it's adding more work for less and less staff. There really is a staff shortage, but a lot of that is because hospitals don't want to hire enough employees as they need to to do things right, and often it's hard to keep people. Nurse burnout is a huge thing the industry faces, and the solutions they have don't involve improving working conditions, but instead they want nursing schools to churn out more graduates every year to simply replace people.
Bluntly speaking, nursing management is also basically what losers aspire to. Most of them lack leadership skills, and to do the job, they basically have to demonstrate to their bosses that they are adept at pushing staff to do unpopular things. If they stand up to their bosses on things they know are bad ideas, they don't advance. It's typical management issues like any industry has, but the true amount of impact or control you have over something as a manager is almost nil. I make almost as much as my manager, and work 3 days to a manager's 5 days, and I don't carry a cell phone I have to answer in the middle of the night. I have had great bosses, but I wouldn't want to do their work. If you want to be a manager, skip nursing and just go work in any other industry, because it won't be worth going to nursing school. And like I say, you don't become a nurse to become a PA, you do it to become an NP. It's overkill to go from nursing to PA. It's more expensive, and time consuming, and there are tons and tons of PA schools you can get into with no healthcare experience.