Whilst restrictions are still in place, you can only stay in serviced (hotel) accommodation for very specific reasons.
If you are visiting the city between 12th April and 17th May, you will be able to stay in fully self-contained accommodation. There are a number of agencies offering short-term letting accommodation. You will find more details of their availability, tariffs and booking processes by visiting the individual websites:
Individual, rural self-catering accommodation properties can be found here.