Well, I'm sure you realize that you are at a disadvantage due to your boating situation. I am not saying that landing an invert behind that boat is impossible. But, it is very hard to LEARN an invert behind that boat. I would say, just focus on trying to make the most of it. Also, you might want to pick up wakeskating as another water sport for you to play around with. That wake would be perfectly fine for that.
I just re-read your post...and you made no mention of inverts, so I don't know why I even mentioned it. Anyways, your boat will be fine for carving around, doing a handful of grabs, and having fun doing 180's, and even 360's. Also, 60-65 feet is probably the right rope length for your boat.