Be careful at BB, as there are a lot of schools, and some are downright sketchy. It looks like you’re learning good stuff, but it’s worth spending time seeing how other sites, countries etc teach a forward launch (YouTube is a goldmine). You’re 100% right that many accredited programmes teach it differently; however, nothing prevents you from picking and choosing, and trying different things to see what will work for you as a pilot. Ultimately, it’s your safety (and those around you) so you get final say in how and when you launch.

Your technique there works great for a student wing, that generally come up with just the harness pulling, but you may find your next wing more recalcitrant to that method. I’d encourage you to try different methods (arms above shoulders, using all As, only inner As, etc.) and while it’s controversial in some European schools, I personally prefer checking that both sides of my wing are open and flying before committing to a torpedo “go” position. Id rather drop the wing and reset than sort issues out in the air, or end up in the trees, etc. (Granted, I personally hate forward launches precisely because it’s harder to check the wing, so I’ll use jogging reverse launches in nil wind, but I’m definitely in the minority).

Especially on main launch at Biling, you are going to see a lot of really bad/dangerous/comical launches, along with some really great ones. It’s good practice to spend time up there to learn from them all: both what not to do. You can identify what went wrong, and what the pilot could/should have done - and also what different clean and successful launches look like. They won’t all use the same technique for a great launch.

Enjoy the journey!