thank you so much Andreas and Amigaharry (ofc Koszer as well) !!

I learned a bit regarding configuring UAE now - was not aware, that some pre-made configs may not include settings for all variables :)

Now I deleted the stuff I think I do not need, added a few things (ofc changed paths) and I got a working A1200 AGA config (JIT enabled!)

Ok - now comes the hardest part, installing a WB XD