Finding an apartment after a positive decision on asylum
After you have received a positive decision on asylum and to not have a job yet, you should not move to Vienna right away. In Vienna, unemployment rates and rents are very high.
First, you should find a job anywhere in Austria and move there. Through this job you will quickly become a valuable member of Austrian society and after a few months or years you can always apply for a job in Vienna and then move there. People who want to be successful in Austria have to be flexible.
There are two things that help you find a good apartment in Austria:
1) You should be able to demonstrate that you speak German very well.
2) You should have a job, then you have a payment slip that you can show to landlords.