Oh boy would a lot be different for me (I was actually having a similar conversation about this today with Dusty. What a coincidence!)
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To answer your questions:
-I would probably still be living with my mom
-Might have either gone to college or joined the military
-my grades probably would have stayed the same tbh
-I don't think I would be a better person. In fact, I think I would be worse off.
-I would have never gotten into pixel art or the little bit of scripting I actually know (If that even counts)
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Other things that would have been different:
-I wouldn't occasionally hear graal sounds in some songs I listen to (like the bomb, gralat, and chorus sounds ._.)
-Might have been better at drawing on paper
-Would have probably never gotten a tablet and started drawing digitally
-Never would have discovered that I like digital art a lot more than printed art
-Might not have been as techy as I am now
-Probably wouldn't be as into gaming as I am now
-Probably would have never met Dusty (which is the biggest impact imo)
There's probably more but that's all the most important stuff I can think of right now.