2Fingers, there is a part of being a musician that you will NEVER learn in school, whether your HS projects or even if you work up and go on to Berklee or any of the handful of other great music colleges.
You could call it paying your dues, learning the rules of the road, the hang, there's any number of ways to put it. And if you're a great player, you're not inclined to suffer fools gladly . . . . . . but in a lot of cases, that's exactly what you're going to have to do.
Despite what you've accomplished so far, there's a lot to learn, and your interaction with other musicians (who often may not be 'all that'), and thriving on the bandstand with them is a big part of learning your trade.
Otherwise, you can get pegged so fast you won't believe it as that 'smart-ass kid who was trying to tell ME how to set up my Mesa'. Musicians gossip worse than old ladies. Word of mouth in any local scene is everything, and it's way too easy to screw yourself out of it. I've been there. Maybe you are the new hot bass player, but keep running that mouth and they'll be more than happy to find a guy with lesser chops, but is a great guy to be around. Music business isn't like the Olympics, there's more to it than just being the best player, and it sure isn't fair.
DON'T be that guy.
Keep your eyes and ears open, get your radar and intuition going, and IF you got to pipe up, be supportive and sympatico . . . . . and respect your elders. IF someone's going to offer you a gig, make damn sure you got the playing covered, and leave them thinking how easy it was to work with you. That's how you make your bones and get more calls.
This guy has paying gigs, writes his own music, and is smart enough to play a Boogie, and offered you a job and pays you to do it. Remember that. And yes, you are that green, but we ALL were in our time.
As time and budget allows, you're gonna need more than a 112 combo. If you start playing lots of clubs, it will run the gamut from a few spots with great FOH, to places that barely have enough to call a bingo game. So you're going to have to cover yourself for all those 'other' places with a rig big enough to carry the room(s).
I'm not getting on you: I'm trying to tell you the things I wish someone would have told me.