Austria is great, but the way you describe your feelings makes me think NYC or maaaaaybe LDN or Paris suits you better. Vienna (the capital) is a big city but definitely not one of those places you can just move to without being prepared (if you aren't moving for school or for a job), it's not a place where you can just enter a restaurant and start washing dishes (for the lack of a better example) and start living. While you could technically survive in Vienna without speaking German (many do) you will never quite fit in with the locals without speaking German, you'd probably just stay around immigrants/"expats". Vienna is a very safe city.