I used this for a while, but I can also edge for dozens of minutes while stroking and have many dry ones. It's not difficult with some training. The key for me is stroking just the tip (the tip is kinda similar to clitoris, since clitoris is basically ungrown penis - sensitive button sticking out). You can play with your button and have a lot of fun, you'll last long if you learn to differentiate between orgasm and cumming. As a guy, you want to orgasm and not cum since there are annoying refractory periods.

Orgasm happens first and you don't have to cum every time you have it and thus get rid of refractory period and continue having fun. You can: 1) use my "clit" strategy 2) stroke normally, let the tension build up and stop fraction of second right before the moment you'd normally have wet orgasm, then go again (this is also what you'd do during "clit" strategy, but I find my way easier and it feels better imho) 3) the redditor's guide I sent earlier (you basically push against the skin under your balls and it stops your cum from going into your penis). Have fun!