So every state is a little different. Some areas of the country it is a big no no to ride on the sidewalks, anyway the sidewalk is not conducive to road biking no matter. I mostly ride vintage cruisers, they are fun to ride on the sidewalk. In suburban Detroit many people ride on the sidewalks, in fact when I was young if you were to ride in the street before you were 12 the police would write you a citation that you had to have signed by your parents and returned to the court. I had like 20 of them lol they would also write you up for riding 2 on bicycle.
Anywhere you are you have a right to ride in the road on any kind of bicycle. My response when yelled at to get on the sidewalk is to give the double bird and drop the f bomb, probably not the best response lol.
One guy told me I had the gravel shoulder to ride on, I told him to drive his car on the shoulder and to f off.
Just be careful some people hate cyclists.
My motto is to have fun, I ride about 100 miles a week all year long, mostly on a cruiser. I am seldom on time constraints like people who commute. If you are just make sure you leave early enough so you dont do dangerous things just to be on time.