You might check how old your map is. That device is from 14 or more years ago. If roads and bike routes have been added or changed in your area then you might not get very satisfactory use of the navigation. Possibly Garmin's current updated maps still work on it. Maybe you can update them through Garmin Express or the Garmin phone app if that'll connect to it through the wifi. You might be able to get some open source maps. But I'm also not sure if that model Edge accepts them. Another member will probably will remember.
For other stuff, like recording your rides, showing you how blazingly fast or sadly how slow you are, it should do fine. <grin>
<Prompted> I think is for whether or not you get messages telling you where to turn. Otherwise you just follow the course on the map.
Play with the settings to see what they do for you. Only change one or two unrelated things at a time so you can know what did what.