@JE08011987,
You... don't seem to know what you want.
I am going to operate under the assumption that you don't need the money these secondary jobs bring in (if I am wrong, please feel free to correct me). If not, then don't do them for money. Why? Because (a) you don't need to and (b ) by working these extra jobs, it seems to me you're taking employment away from someone who doesn't have the connections, education, ability, or capacity to work a professional career. Your working at the car wash means a new immigrant, a person with Down's syndrome, a kid putting themselves through school, or anyone else who needs such work doesn't get it.
It's also interesting to me that you don't want your coworkers to see you at these jobs. Hence to my mind (I am not a doctor), you sound like someone grabbing at what feels like forbidden fruit. Hey, it's far better than doing drugs or engaging in risky sexual behaviors. But you may still be getting a jolt out of this kind of work being something which others would see as beneath you -- even if you don't consciously feel that way.
And recognize hiding stuff tends to accompany shame and/or feelings that something is wrong. You don't have to shout it in the streets, but putting a behavior under wraps has implications, no matter what you say about how you enjoy such labor. Could it be you feel guilty about your opportunities in life?
As an aside, you're smart to consider your fatigue in all of this. Driving while tired can be about as bad as driving while intoxicated. Plus not getting enough sleep messes up all sorts of things. If you're trying to lose weight (for example), you need sleep!
Doing all of these outside labors may also be a degree of avoidance behavior. Can't clean -- gotta polish them fenders. Can't go meet someone -- gotta clean the grease rack. You get the idea.
So here's an idea which I hope will satisfy a lot of your impulses at the same time.
Waiting tables and working at the car wash have two major things in common. They are both physical labor and they both involve dealing with the public. If you sit behind a desk all day long at your regular job, then you're not getting either, and you're craving that.
So why not get those things by volunteering to plant trees or build houses or serve up soup? You can do so in your town so that eliminates the driving and fatigue hazards. It's also something which, if your day job colleagues spot you doing, won't erase any street cred you've got with them. But you're not likely to run into your coworkers unless they also volunteer.
Another perk of volunteering is you're not throwing someone else out of work just for this hobby (can't think of a better word for it). You can wear whatever you like. If you show up to serve soup in a gas station attendant's uniform (a rather interesting form of cosplay, BTW), then the church or community center won't care so long as you're clean and you do what's expected of you.
And it won't harm your career trajectory if you volunteer. Hell, it'll probably make you look tons better to the powers that be, if they've got any sense.
You can do a ton of good in the world.
And, because every topic gets a soundtrack, here's yours