Help!!! New Luger owner.

I have just taken posession of a 1917? "Erfurt" Luger pistol. I have to admit I know nothing about it, it looks like its in great shape though. I would like to fire it but I want to become more familiar with it and clean it first. I have one magazine with it and nothing else. I understand its a 9mm but can any 9mm ammo be used? If anyone can point me in the right direction or help me out I would greatly appreciate it.

Thanks