If your dog is only 1 year old, I think you can definately train him/her in Schutzhund. Around the age of 8 is when I wouldn't do SchH anymore, or even try to go for it, because some of the work can be too hard on an older dog's bones/joints.
If you find a club that is willing to train you and your 1 year old Shepherd, that's great!
Almost all Schutzhund clubs train with German commands, so if you have already mastered that, super; if you have not, they might "re-teach" your dog with the German commands or just let you go with English (it all depends on the club).
Varick vom Haus Jeffery
Dark Sable, intact male
DDR/West German Show Lines