Looking for a long-term apartment

Me and my partner just moved to Vienna and are now looking for a longer-term apartment for us to set our life in the city. I am originally from Vienna (with an Austrian nationality) and returning to my roots in a way, hoping to also take command of the German language after spending many years in Finland. We are looking for a furnished 2-3 room apartment, having most importantly a stable and reliable internet (ethernet) connection since we both work from home. We are currently living in Josefstadt with the option of staying here until the end of April. However, if we find a perfect apartment, we are ready to move in immediately. Our budget ideally falls somewhere below 900/month, including all costs. I'm happy to give more information about us and look forward to any offers!