A decent amount of bankroll and the positive mindset should be replaced with a clear mental state instead because positivity or optimism wouldn't get you anywhere In gambling. It's a game of luck and you being positive isn't going to attract luck. Your positivity should only be in the sense that you are not gambling to chase losses or become an addict that would be ruined by this damaging lifestyle
You’re right about having a decent bankroll and a positive mindset, that’s a solid start. but something still has to change: stop thinking of it purely as a game of luck. That mindset won’t help you in the long run.
Try to approach it like a game where you can apply strategy and skill. At the same time, always be ready to accept losses as part of the process as it's normal. What matters most is aiming for profitability in the long run, meaning, more wins than losses over time. That’s the mindset that will push you to improve.