I now live in a great area for bicycling and am thinking about taking it up out in rural areas where my presence won’t trigger anyone. I don’t know a damn thing about them and I know there are some aficionados here. I’m basically just going to be road riding and on some trails in the state park and wildlife area nearby.
I suggest you start with riding on multi-use trails to gain hands-on experience. Then look for low-volume roads that have wide shoulders.
The local bike club may have a map of preferred bike routes in the area. These maps are typically available online or at local bike shops. You can also look at the routes that local riders in your area are taking via the ride logging website Strava.com.
The League of American Bicyclists has a good series of “smart cycling” videos on how to ride safely and effectively with traffic.
https://bikeleague.org/ridesmartvideosFinally, make sure you keep your tires properly inflated, take a water bottle and energy bar on the ride and bring an extra tube and tire levers to fix a flat. YouTube has multiple videos on how to change a flat tire.