Looking for a short series from the 80s or early 90s
MC was a guy. Had a bicycle. Some incident with a rich woman had her throw a bunch of money at him. She later asked for it back, but he had already spent it - paying off loan sharks for some couple being threatened.
There's a scene where he's learning to program on a fake keyboard with a book. No computer.
Eventually gets job with rich woman's programming company. As janitor.