Someone will come in with your exact boat and maybe give you some advice, but I'll try to give you just general advice.
I'm never really fully on plane in my Malibu 23lsv. It eats more gas, but you don't need to be on plane. If you want to be on plane, just empty out the ballasts in the rear a little at a time until you are (or add a ton more weight up front). If your right side is washed out, either add weight on the right or take away weight on the left. It sounds like your boat has a really good amount of built in weight (atleast compared to the 1350 in my 2007). So if you want to be hassle free just fill up all the stock ballasts and then adjust to the perfect weight by emptying different sides. You don't have to sack out your boat into the water to have a good time and even do advance tricks.
Check this video out if you have any doubt:
https://www.youtube.com/watch?v=Nogr8GCIL9k
A good rope length is between 60-75ft. If your not an advance rider, 65ft is a very happy medium. As far as speed goes, just remember that the faster you go the worse the pain. At 65ft you can very comfortable ride between 20.5-22mph. Many people try to compensate for lack of form with speed or wake size. This will just hold you back in the long run. Keep in mind that with correct form you can clear the wakes at 18mph on even wide boats. Clearing the wakes by going super fast will just result in a no pop jump with a much higher risk of injury. IT would be better to shorten the line VS going much faster.
BTW many people will disagree with the philosophy of going on the slower side with standard size wakes. But then you gotta ask yourself why so many people have so many injuries..... Sure it can happen to anyone on any setup, but I'm willing to bet the guys going faster on sacked out boats are taking much worse falls and have many more injuries.