^This is all pretty good for backside noseslides. Make sure you have your center of gravity over the nose, don't over turn so that your wheel jams. You can practice just going stationary or slow, ollieing 90 degrees into a nosestall and see if you can just stand on it indefinitely. If you can, sliding is the same as doing that with some speed. Once you get the feeling, you can really do them pretty indefinitely if the ledge is good and you have enough wax.
Could use some help for long frontside noseslides, I find switch front noses a tiny bit easier to hold but both are a struggle. Longest ones I've slid both ways have been a hair over two board lengths, measured it once lol. But definitely hard to reproduce that and I feel like I'm not really leaning into it like with a backside noseslide. I jam my wheels a lot with slightly overrating when getting in if I really try to lean into it and sit on it.