What kind? Does it already have a ceiling? Need more information.
We've done lots! Here are our ideas: https://www.frugalfamilytimes.com/search?q=ceiling
Hi Michelle, is it a plaster ceiling you have? You can patch and paint it, here is one video for plaster
And how to repair drywall ceiling
You can patch and repair, remove and replace or cover an existing ceiling. A lot depends on what you are starting with.