Hey new people on Mastodon!
For privacy reasons there's no automated "people to follow" suggestions on here.
However, there is an unofficial community site called #Trunk
which is an opt-in list of people who are looking for followers, organised by topic:https://communitywiki.org/trunk/
Scroll down to find people to follow, or read the instructions at the top if you want to be added to a list.
For example, here's the list for "Science Fiction":https://communitywiki.org/trunk/grab/Science%20Fiction