How did you do it? I do it by pushing the base of my thumb down and backwards, and I feel the crack right at the base of my wrist towards the side of the thumb. I suspect I’m actually cracking my thumb, since I’m pushing on my thumb’s metacarpal, but I feel it in my wrist.
I use “US International with AltGr dead keys”. I’m most used to the US layout, and I need to type in other languages, so this layout works perfectly. I’ve gotten used to it enough that I just use this layout on every keyboard regardless of what the keyboards say on their keys. The hardest was probably using this layout on on an AZERTY keyboard, I’d often forget where keys were, but it worked well enough.