Wow! Welsh pronunciation and word order is tricky. I'm just getting started on the tree and am also crossing over from German. I'm guessing there isn't a lot of similarities between the two languages.
Welsh is extremely phonetic. Compared to the layers upon layers of rules governing Irish pronunciation, for example, Welsh is really pretty straightforward.
Here is a great series of videos about pronunciation:- https://www.youtube.com/watch?v=16sqX2Baprg&list=PLz6oFM0_IszwxmU7dMcGQClZ5zMwX2EdY
For some reason I've actually found the word order really intuitive. (Definitely rather different from German, though.)