Dog poop,residential and commercial property.
And you might check with your school head custodian or principle.I'd leave out the gun part.
Neighbors around schools often use the campus for a dog park after hours.Next to the walks,on the playgrounds
Coach might appreciate a clean football field,for example.
There may be some PTO fund $ or ? available.Does not hurt to ask.
Occasionally as student might get a couple hours after school as a custodian helper.
Remember,look for something simple,necessary,and really crappy to do.Thats what people are willing to pay for.
Here is the magic.If you get a gig,smile,follow instructions.Show up.Produce.Solve as many of your own problems as you can...work independently.
It does not matter what you are doing(just so it is legal,safe,etc)
Your opportunity is to become known as a worker.
Most working adults have more to do than they can get done.At some point,if you develop the right relationship(show up,get it done,etc)they will keep you in mind.Be a "can do" guy.
Next thing you know,they will tell friends about you.Keep developing that rep,and you will have job offers in your future.
You might try making a list of things you know you can do well,and some other info and put it on a business card.
Maybe with your scooter you could be a "go fer" for young moms with new babies or older folks.
What if you could just show up and say Hi to an old person living alone.Talk with them 1/2 hour.Go pick up some medicine or coffee or whatever small thing they might need.Pick up something heavy for them.
Have a number of their family member you call,maybe every time.
"Hi,this is Moisin.I'm here with your Aunt Sally.She is having a good day.I went and picked up her blood pressure meds for her.So,if we could write down my usual $5 for checking on her plus $5 for the errand? Thanks,talk to you tomorrow Bye"
Folks on trips,feed pets,lights on and off,mail and newspaper pickup...
With all of these,discuss them with your folks.Get some feedback.I would not just post your business cards on laundramat bulletin boards.Give them to folks you know and trust.