It's usually difficult to make an actual living, but it is possible to make money. The best places to start are to join a couple of print on demand sites and make your work available online, and to go to a local market/convention/event with a selection of locally printed art to sell directly. The latter will usually make you more money per sale (as the POD sites take a large cut) but will be more work and you may find fewer opportunities. The former lets you sell to a wider audience and experiment with different designs, but can require fairly active promotion.

But they are both fairly easy ways to get started and experiment with selling your work.