StreetComplete makes contributing to OpenStreetMap easy and fun by turning contributions into "quests" on a map for you to complete. No personal information is required, just create an OpenStreetMap account, and start contributing directly in your area!
I tried this out myself, and it is truly fantastic! I had never heard of it, and I'm sure many of you haven't either, so spread the word!
Tip: When entering buildings to ask questions (opening hours, etc.) be ready to explain what OpenStreetMap is :)
I would like to recommend SCEE if you've been using StreetComplete for a while. It offers some advanced features like editing tags, but more importantly some needed QOL improvements like the overlay quick-selector, and GPX notes.