Facebook Story Friends and Neighbors is a good group to get started. You can learn the ropes of the game and what is expected out of you.
Royal Story Add Me group is a good group to gain Royal Story neighbors quickly. Remember if you ask for friend requests. To accept them all in a timely manner. I have witness where people will ask for friends request. But leave my request sitting. That is not nice. Frankly, I find it rude. If you accept me and realize you do not want to be friends. Accept me as a friend in the game, you can quickly unfriend me. I will still stay a neighbor in the game.
To play, look up the "Royal Story" app.