Have fun with the PPk,,just take it easy on it. It's a collectible pistol in it's original condition and anything done to it that deminishes that condition devalues it greatly.
The original one-piece grip is particularly prone to cracking and damage. Many are already cracked and/or warped just from age.
Original mfg'r replacements are tough to find and expensive when you do.
Most any over the counter commercial 32acp FMJ will function the pistol just fine.
Other than a recoil spring thats been replaced w/a lighter weight or the original one that's been clipped a small amount,,both in attempts to make the manual operation easier,,there isn't a whole lot that can be done to them that may damage the pistol during firing.
Just a simple blow-back operation design.
Make sure the cartridge loaded chamber indicator is free to move or it will cause feeding problems.
They get stuck in place with old dried oil on souvenier pistols that have sat around some times.
Pull the slide open and let it lock back.
Look at the breech face. The indicator tip should be forward and down in the counterbore for the case head.
Use a small tool to pick it up and push it backwards to see if it's free to move.
It's under a bit of spring pressure, but it should be able to be pushed up and back,,the same movement the loaded case and the closing slide must do.
A touch of oil helps keep it free.
Have fun with it.
I drag my 1937/8 mfg'r PPk .32 out once in a while and run a couple magazines thru it too. Just because.
I still kick myself all these years later for not buying that PPk in 25acp,,,what a nube