Ordered my First HK USPc 9mm LEM V7

Just ordered my first HK
USPc 9mm LEM V7 Law Enforcement Package (NS and 3rd Mag)

I paid $850 delivered (if that is good)

Is there anything I need to know or anything I should do before I take it to the range?

Any accessories that are a MUST have for this weapon?

I have a feeling the wife is going to take it from me as her EDC weapon LOL