im unsure if all of their services can apply for you or if you even live in the United States, but the United Way 211 is usually a good start to find resources in your area. they may be able to provide you
transportation through a partnered service. you can
email the general 211 organization if you're averse to calling or want/need to avoid getting your mom's attention.
im unsure if it can apply to your local 211, but if they offer it, you can go through the local 211's website to see what assistance and programs they have that you could possibly apply for. you can look up for your local 211
here.
if you don't live in the United States, the
United Way can still point you to other resources that they or other organizations can provide
there's a chance you'll need a job sadly. as you are presumably in education right now, you may have to look for seasonal positions (brief periods of work that usually lasts a few months) or a part-time position. during and/or prior the interview process, you will likely have to bring it up with your employer. you can also go ahead and ask employees of a store if they know the store is currently hiring or not! sometimes they can get you to discuss possibly applying with the manager if they're available/willing. if you're still in school and there are local businesses close to the
school and you are willing/able to walk/bike/skate there, then you can similarly ask if they're currently hiring or will have positions avaliable soon.
if you can't/would not like to apply for a job that requires you to be transported daily, you can probably take up commission work through art, bracelet making, and so on (though if you're making something tangible and sell it online, you will likely have to face the inconvenience of transportation to and from the post office, plus online commerce requires you to have a bank account). if you're still in school, you can start your commission work there!
in the end, im sorry you're going through that. i wish you the best of luck.