Find a gallery that would have a show for you. Or a rep. Or participate in a group show. Or have a booth at a fair-type show. Some restaurants even show art and sell, taking a commission. Your investment is low, limited to the frames and any postcards you wish to send. They will often front money for publicity, with you sharing your mailing list. if your work is in collections, work up a resume. And have a price list ready for potential customers.