Welcome!
If your manufacturing date is receint, which it probably is, just go shoot it! The R9 is cleaned and lubed after test firing from the factory. The current recoil springs are good for 200 to 250 rounds. Many R9 owners recomend 115gr Win STHPs, or Speer GDHPs. Range fodder is 115gr Winchester White Box. Other ammo may work well also, but these have been great for me.
Rick