Online platforms like Goodreads are excellent for finding interesting fiction novels. You can see reviews from other readers, join groups with similar interests and get personalized book recommendations. Bookstores also have staff who can give you advice. Look for books that have won literary awards as they are usually of high quality.
You can start by asking for recommendations from friends or family. They might know some great books based on your interests. Also, checking out local libraries is a good idea. Librarians are often very helpful in suggesting fiction novels.