When in doubt, start simple. Good topics are:
Small enough to finish in a week or two
Useful to a real audience
Specific (not vague or generic)
Instructions/documentation
“Set up encrypted backups on a Mac (first-time freelancers)”
“Prep a skateboard for winter (beginners)”
Short video
“Export Figma → PDF with selectable text (2 min)”
“Bake-in captions on iPhone using Clips (90s)”
Mini manual
“New-hire IT checklist for a 5-person shop (one-pager per task)”
“Board game quick-start: Wingspan in 10 minutes”
Proposal/brief
“Replace PDF forms with a web form for intake (clinic)”
“Add alt-text standards to our CMS (small nonprofit)”
Overdone basics (change a tire, tie a tie, make scrambled eggs)
Generic life hacks with no clear outcome
Highly polarizing persuasion topics