Long range in Germany is 300mtrs. Most Jerries follow ISSF disciplines for air rifle/pistol, .22lr and 300mtr with 6PPC or similiar. These are very well catered for.
Without German you will have a problem passing tests required for a firearms license (which you do within the 1 year probation time at a club), but no problem of course for air rifle/pistol.
TBH, I found it too much trouble even to bring my UK guns over when I was still serving, and storing interesting kit in the armoury anywhere proved to be a 2 edged sword...
If you know where you will be based PM me and I can tell you what is available locally - it could be that they have decent club guns and enough English speakers to help someone keen along.