I’m pretty sure the OnePlus 12 could meet all that, haven’t looked up rooting but otherwise I’m pretty sure it’s easy to do. Also, I’m bringing it up because I just got it and it’s the best phone I’ve ever had in my life by far, no bloatware super fast and easy to use.

Actual practice is the best answer, as everyone has already said, but to tag in something you can work on outside of real debates – work on controlling your emotions so they don’t interfere with your mind.