If you have iPhone then GoMap!! is a really good editor. On computer you can also open https://www.openstreetmap.org/ https://www.openstreetmap.org/ and naviga

If you have iPhone then GoMap!! is a really good editor. On computer you can also open https://www.openstreetmap.org/ https://www.openstreetmap.org/ and navigate to are you know well and press edit (tutorial should appear). There is also Vespucci on Android and JOSM for PC for more powerful and more complicated editing. All editing requires registration for user account. Feel free to use one of https://wiki.openstreetmap.org/wiki/Contact_channels https://wiki.openstreetmap.org/wiki/Contact_channels if you want help from a community (and "I am confused newbie" is a good reason to ask).