Im not sure an isonic would be so good for you Doug, I think maybe you would do better on a smaller freeride type board if you can get one, or maybe something in a freestyle wave with a power box fin setup.
Im thinking of where you are at with your skill level, a freestyle wave will still be fast and IMHO a bit more forgiving with the straps not so far outboard.
But as ejmack stated you will need to have those waterstarts nailed, then again good way to learn when you have no other option than to water start.