Hi Debber, welcome to the forum.
Your tank is severely undersized for goldfish. They require 20 gallons for the first one, and an additional 10 gallons for each additional goldfish. They are really messy fish. Even in a filtered tank, which they absolutely require, they would need a 50% water change weekly.
If you have no fish now, you can do a fishless cycle with a filter to establish your beneficial bacteria. At that point, you can get more fish, but to be honest, you'll be very limited because of the size and shape of this bowl.
75: blood parrots, featherfin cat, emperor tetras, turquoise rainbowfish, BN plecos, japanese trapdoor; 46: WCMM, gold inca snails, ghost, bamboo & amano shrimp, kuhli loaches, rummynose & ember tetras, endlers, platies, flame gourami, guppies; 16: pygmy, peppered, loxozonus corys, otos, assassins, RCS ... ~ Research PRIOR to purchase.... ~