Low level coding and free open source software for me mostly.

I’ve met some people who like to map areas on OpenStreetMap and I’d be interested in trying it myself but like with contributing to anything I’m new to I’m scared of doing something wrong. I understand that with OpenStreetMap there’s a sort of discussion of changes like on Wikipedia?

When you started what resources helped you, did a friend show you? Is there a tutorial you recommend for starting off? (If you explained some of this somewhere else please feel free to link to it or tell me, I haven’t read through all the comments here yet.)