I think it’s great you are (were?) interested in working in Germany.
However, there are hoops to jump through, as you may have found out. You need to get a license (as in your qualifications need to be checked and certified), which isn’t cheap but manageable I think. You need to contact the ministry of health in the federal state you‘d like to be working in.
As it is, it might be difficult to find something without speaking German. But in a city like Berlin, I think there may be opportunities. If you‘d like, you can send me a short statement about what you‘re looking for and I could post it to a German OT group on facebook?