Retreats in Eastern/Central Europe for beginners

Hi everyone:) I have been interested in Buddhism for a few years now. I also meditate somewhat regularly. I feel like many Buddhist truths are close to my world outlook, even since I was a kid. But there is only so far you can go alone. I'd love to learn from people and not just my own analysis/books.

I'd love to go to a place for a week or so to learn more. At this point I am not sure if Zen or Tibetan Buddhism would be a better fit, but maybe it doesn't even matter. I's like to pay more attention to my mind and learn more. If I am so drawn to Buddhism, there has to be a reason for it, I believe. But I am somewhat secular I wouldn't want to be too pressured to get into the cosmology/esoteric side of it. Maybe one day. But not yet.

Are there any places I could go to, does anyone have any experiences in Poland or Germany? I could go further if there's a really suitable place for someone like me, though.