About the structure

what is the correct way to say in german “Now I’m studying german”

“Ich lerne jetzt Deutsch.” or “Jetzt lerne ich Deutsch.” In the second version you emphasize that you do it NOW.
If you study at University: “Ich studiere jetzt Deutsch.” or “Jetzt studiere ich Deutsch”. Same as abouve.

Definitely I’m sure the german grammar rules is unlike anything I know.
But I’ll never give up!

thanks one more time Veral