Proofing as a Service?
Here's a real thing I'd enjoying doing for money: Proofreading & "proofcoding" JS framework tutorials. Maybe even on a subscription basis; every 3 months I'll rework your tutorial from scratch and see what breaks.
Bonus: An excuse to learn All The Things.
CV: 10 yrs executive & legislative lawyering (reading/writing/editing/critical analysis/critical communication), 3 years self-taught JS via dozens of half-broken tutorials trailed by years' worth of comments.
(This post brought to you by a graphQL & Authentication tutorial that I don't want to name-and-shame.)