If you are not comfortable with editors or don’t want to corrupt existing data, you can contribute to OpenStreetMap with notes.

I know a mapper who created an account 3 years ago and didn’t do a single edit. But he will regularly survey places and create notes, which I use to update the map.

I endeavour to put a link to the newly-created object in the note and sometimes ask for more details. Now, we understand each other well and he knows what information is useful. A great partnership!