What kind of job should I try to get? I’m in NJ

I’m 27, I worked mostly in food service, now I’m in delivery. I thought I was going to get a job at Usps but after I accepted a conditional offer, it was pulled. I’m at a loss and not sure what to try to do. I only have a high school diploma. I have trouble standing long hours due a birth defect but was willing to if the job was something I’d enjoy. I tried getting office jobs before but nobody called back. I’m interested in a it/tech support job but don’t know where to start with it. Any advice is appreciated

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