If you ever get the chance to chat with Jed Selby, pick his brain. He was a hard charger, firing up hard stuff his 2nd year boating and he turned out all right
or Jeremy Signorini, same thing, rad boater. There's plenty of boaters that have pushed their boundaries and been just fine, just don't be stupid about it. Swimming Class V - V+ is not a whole lot of fun, neither is breaking bones or worse. Have fun with it. Sounds like you already know how to jump off of stuff. Learn to translate those skills to boating. Sounds like you probably have the mental game but the skills maybe need to catch up. There are so many ( good / bad ) things that can happen in an instant in the middle of big, hard drops. Just make sure you're ready for it because I've also seen some pretty awesome boaters get destroyed when they weren't expecting it.