I would highly recommend that you try to "shadow" a CRNA for a day and see if you really like it first of all. You may actually find that you like another area of nursing that you prefer while you are completing your nursing program.
Either way, you should consider age also into this. You have been used to working the same hours all of the time in a set schedule, with anesthesia that goes out the window. You will be bouncing all over in terms of hours worked, and shifts worked. At many hospitals, they also have twenty four hour shifts. Do you feel that this is something that you would be able to handle? I have nothing against age, I am in the same ball park as you, but I would seriously reconsider a specialty at this point. Remember that during your CRNA program, you will not have an income coming in, same thing if you decide to pursue the DO/MD route. But you will also have the living expenses and tuition fees. This is something else to consider.
Good luck with whatever you decide to do.
Nursing News