There are over seven billion people on the planet right now. If you are creating something, you should be able to find an audience for your work somewhere.
Audience building depends largely on your reasons for producing creative work in the first place. It is fine to be creative for yourself as personal expression but there are also many good reasons to build an audience. An audience can becomes patrons, purchasing or financially supporting your creative efforts. Creating work that engenders thought, emotion or action can have a powerful impact on both the audience and the artist. Like the proverbial tree falling in the forest, creative output needs an audience to be fully expressed.
Public space is too crowded, noisy and competitive to take a "build it and they will come" approach to finding an audience. What exactly are you creating and who might be interested? A good starting point is with people who are like you. Family, friends and friends of family and friends can help find those who may engage with your work as a result of common experience. Consider audiences of similar artists and audiences of common themes in your work. If you make paintings of tractors, you might find an audience in the farming community.
It really boils down to doing the work, getting content into the public realm, being consistent in your creative output and creating real human connections with audience members. In a world that is becoming more virtual and less real each day, there is an appetite for authenticity and connection. If you can deliver it as an artist, you'll find your audience.