I don’t know how good an idea boating at CBR is.
The waters you have access to are confined.
If you really want to be able to open it up and speed (well as much as you can with 10 horsepower), the best boating in WDW is on Bay Lake/Seven Seas Lagoon which means going to the marinas at any of the 3 monorail resorts, Wilderness Lodge, or Fort Wilderness.
After searching a bit, I could only find postings like this:
[I]Motorboat captains must be at least 12 years old and 5’ tall (for Sea Raycers) or 18 years old (for canopy and pontoon boats). Surrey bicycle drivers must be 18 years old. [/I]