You asked a simple question early on, "Will I earn my money back?" OR similar.
In short, probably not!
There are few guarantees in this life and one is if you don't have a go you will not succeed. You will spend a lot of time and money on this adventure, but don't do it for the money, do it for the adventure.
Sad, but true. There are plenty of ways to make heaps of money in this world and none of them include being a pilot. Job satisfaction is not always linked to pay.
Good luck.
Another thought on aircraft type to learn on; it doesn't matter. What does matter is how well you fly the aircraft and the ability to apply what you know and therefore learn a new type when the time comes.