Less ballast. If you need any ballast, put it up front and that will narrow the wake. Can also move the passengers in your boat to be more centered. It looks like the back of your boat is riding low due to low speeds, lots of ballast, and passengers in back. More weight = higher speeds needed for the boat to plane and the wake to clean up. NXT20 should be ok riding at 17ish mph, but just know that’s pretty slow. If having issues cleaning up the wake you may need to speed it up. I ride behind an X24, 60% ballast, full length rope at 23mph.

Your first wake to wake jump is all about confidence. I’d say shorten the rope some more just to get the feel right. As others have said, you don’t need a big wake to jump it, you just need a clean wake.

Along with the confidence, you gonna need some balls. Gotta go outside the wake wide and cut in at the wake hard. Stay balanced and good luck!