I wish I had some, but I honestly just follow all the standard guides I see online. Start with the wand just below the surface and inject air (paper tearing sound) for around 6 seconds, then bury the wand a bit deeper and find the right angle for a vortex, then keep it spinning until the pitcher is too hot to touch. Tap the pitcher a few times and swirl it around for a bit to pop the large surface bubbles and pour.
I follow this exact set of steps every time, and I still don’t get consistent results. I think the problem lies with the vortex step, I can never consistently find the right angle that produces a strong enough vortex.