One thing you can do as an author is to start a book club in your neighborhood. However, don’t focus on promoting your own books! People will see through that in a heartbeat and be turned off. Rather, make new friends and share your love of reading. As an author, you should be reading as well. Being part of a book club is a natural place to be.
Personal interaction is the best way to attract fans. If people like you and/or find you interesting, they will be curious about your books. It’s okay to let them know you write, but be humble about it. If your books are free somewhere, you can certainly point that out. There’s no telling what networking and connections can result from interacting with your community. Many writers, myself included, are introverts. If you’re not up to starting one, think about joining one. People who love books are what you’re looking for.