Read, watch and practice teaching what you have learned to other people either by posting here or simply testing it out by yourself.

You can start here though: https://learnmeabitcoin.com/

There are other resources as well:
- Compiled resources about BTC - https://www.lopp.net/
- Anything related to security - https://cryptosec.info/
- Videos - https://youtube.com/@aantonop

You can easily engage to discussions if you know what you are talking about.