I tried working in retail in a grocery store stocking shelves just to get out of the house for a while (freelancing is isolating) - and I found it to be really stressful, eventually it caused me to have a meltdown.
I'm unsure how many aspies can work retail, but also know that for many (like myself) it's anxiety provoking.
My best advice: see if you can handle it, if not there's no shame in looking for something else.
Your age, I'd say if grocery stores don't work try movie theaters. It's grimy work cleaning up, but a lot less stressful.