US, late 30s here, and I can drive a manual transmission. It's been a very long time since I last drove a car like this.
I learned from a family friend that only verbally told me what to do. I stalled out many times in traffic while being on my own, not very fun when learning.
But I then watched a lot of YouTube videos which was much more efficient than the family friend.
i never truly learned, but not for lack of trying. I think i got similar training to you, albeit from my dad rather than a family friend. It just never clicked for me. And fortunately it will never need to!