For Austria, you must have be fully vaccinated (as of 1/10/2022) in order to enter the country. You must have physical proof of vaccination with you at all times. Additionally, we recommend having all documents printed out and ready to show at the airport. Although an agent may not check, it's safer to have them on hand.
Currently (as of 1/10/2022), you will not be able to enter the country.
An FFP2 mask (European equivalent of N-95) is needed to enter all indoor public spaces (restaurants, hotels, stores, etc.)