Sounds boring but just doing it more. I find it hard to learn by copying someone as I can’t easily identify the tiny body changes. But trying a problem over and over and trying new things you can learn what works and what doesn’t.

Also asking friends or strangers how they did something can very helpful. I find climbers are very happy to share advice when asked (but usually won’t offer as that can be considered rude).

As for strength, I guess it’s very different muscles. It will help when your fingers, forearms and technique are better I’m sure :)