My local area didn't have any houses mapped, so I started out with the iD editor. It's extremely easy to get started with. It even has an interactive tutorial to get you going. After that I moved on to JOSM to edit more efficiently.
The OSM wiki has a lot of good resourced about all kinds of topics. Something I would suggest you look up is how you're region/country likes to format address data.
And finally whenever you commit a set of changes there's a check box you can tick to ask for someone to double check your changes.