Are you required to file a 2019 tax return? If you are, you should go ahead and file it.
If you are not going to file a return, use the non filer portal to register for the stimulus payment: https://www.irs.gov/coronavirus/non-filers-enter-payment-info-here
See the IRS portal for your current status: Get My Payment | Internal Revenue Service
See these Q&As: https://www.irs.gov/coronavirus/get-my-payment
