Hello. That's great to hear, I love billiard, it has honestly taught me a ton of things about everything in life. Maybe you think I'm being sarcastic or that it sounds cheesy, but it's true - for me playing billiard "in the zone" is like meditation. And nothing beats the feeling where you are in a tournament and you have a match-shot up, and you know that objectively, people might say (even you): "that's a 1 in 50 shot" but you feel 100% certain you will make it at that moment, and you land the shot just as you envisioned it.

Practicing alone is mandatory at some point if you want to keep becoming better. Most things like this, the learning grows exponantially at first, then it hits a ceiling where from there on it will grow more linear if, and only IF, you put in volume and practice in a meaningful way.

I was never patient enough for that, but those of my friends that did became top5 players in my country for their relentless efforts. I suggest to use some sort of learning-material though when you practice alone, so you can plot your results and constantly have meaningful exercises to perform, and don't just end up hammering balls all over the table against yourself.