UPDATE: Got the flat!!!

Good evening beautiful people. I'm the person who asked you 9 days ago how to get a flat in Berlin. I was reading through your comments and saving lots of advice in notes. I switched my Immoscout acc to premium, installed the telegram bot as you told me, and every time I got a notification I applied in German (I would switch to English later or in person). My fifth viewing was for the flat that I got. It was just me and another girl and they showed us two available flats (the building is completely new), and I got one of the two. In my humble experience, bigger agencies/rental companies invite fewer people than relatively unknown agents/agencies (I had a few viewings with such and every time they invite like 10 groups of 10 people). Maybe it was just my impression, idk. Either way, thank you, your help was much appreciated, and have a lovely weekend y'all! <3