Sail vs. Power
As everyone has said it depends on who you are. If it is your nature to take walks in the park or woods without a particular destination and schedule - then I would guess you are inclined towards sailing. If you absolutely have to have a washer dryer and room for a pair of large dogs you need a power boat (and a large trust fund.)
To me being on the water is healing. Especially when the engine is shut off and the quiet sound of the hull slicing through the waves is all you hear.
The advice to try it is very good. You will soon know if it is for you - then come the next round of questions - what type of boat?
In either case you are still a long ways for