Which Exemption to Apply For: Unable to Afford Coverage or Hardship (Ineligible for Medicaid)?

I’ve been reading about exemptions, and I’ve determined that I need to apply for one. It seems to me, however, that I could likely qualify for two: the exemption for those unable to afford coverage (if you live in a state using healthcare.gov), and the hardship exemption for those determined ineligible for Medicaid because their state didn’t expand eligibility for Medicaid under the Affordable Care Act.

How do I know which exemption I should apply for if both seem appropriate? Would both of these exemptions result in someone being eligible for catastrophic insurance?

As a side note, I am 29 years old, unemployed, unmarried, and I have no children. Thank you in advance for any information you can provide!