[rajeshamara]

The only way is to have confidence in you. No one is perfect everyone learns by trial and errors. You become perfect via practice

[throwaway-jr]

Sure but as I mentioned, I've been practicing for about 20 years. Somehow things are not sticking and I'm looking for more actionable advice.

[cimmanom]

You may just need a better feedback cycle. Find a position (junior or mid-level) that will allow you to make architecture decisions or proposals, and get feedback on how your proposal might be improved.

This process is called "design review".