I also learned on a system 2.0. I'd reccomend starting out in the corners as it's a kabajillion times easier and 1000 more forgiving on the falls. The nice thing about the C turns is that because you're swinging around you have line tension for the entire turn. So when you're edging in, edge like you would at first for the C turn, sit down on your butt like you're in a chair, set that heel edge and keep it building! Then when you feel the runner stop and the handle almost move back against your direction of travel, that's when you kinda rock to your back foot tuck the toes and let the line tension pick you up.
It's easier to learn in the corner because of that timing piece of when the runner stops. no need to worry about "enough edge" or "timing the tension" with System 2.0s corners.
When you're in the air make sure to keep your eyes open. If you're looking at the water then you should pull the handle to your hips almost automatically.
Don't stop at raleys in the corners though! almost everything that doesn't require the removal of line tension is easier in the corner!
Front flips, s bends, hinterbergers, backrolls front flips to revert etc
When you have that down and feel comfortable with it that's when I'd take it to the flats. and now that you know what's going to happen, you won't be scared and close your eyes and get hurt! So start off on your toe side of the cable, that'll give you more room to set your edge, pull the handle tight to your hips and when you're ready sit back on your heels. Really build that edge, but now that you're in the flat you have to tell yourself when you have enough linetension and edge as the runner is just going to keep pulling. SO once you know you're good/have enough. Rock to that back foot, hold the heel edge and it almost feels like you're trying to cut back against the way the cable is pulling you but it's a FLICK and you have to flick fast! You're going to feel like a rocketship coming out of a slingshot so enjoy it! but make sure to keep your eyes open because catching toes/heels coming down on air tricks is considered to be one of the worst falls you can take. Keep your eyes open and look for the water. You won't need to pull on the handle nearly as hard because you should be up considerably higher than you are when you raley in the corner. you'll be landing with a slack rope so get ready for a little yank after you ride a few feet but yeah congratulations!
Post a video once you land it. Outside of doing the raleys in the corners I didn't really find anything off the water that could help.