Once you have registered your NFZ account at ZUS, you should make your first payment. This way, your insurance will be valid/active that very same day.

You can make this payment at any post office [using cash] or at your bank.

Use the instruction sheet you were provided by the NFZ employee.
It contains the full account number you will be paying your fees to.

There is a post office in Old Town conveniently located very close to the ZUS office.

You CAN make more than one payment at a time, as long as:

1. you make separate money transfers
2. you write on each transfer the name of the month you are paying for.
   
   

Also, you need to submit a new DRA form at the ZUS office for every month you are paying your fees.
HOWEVER, you also CAN submit more than one DRA form at a time.

In sum – you can make just 1 visit to the bank [or post office] and 1 visit to the ZUS office and still take care of everything for the entire calendar year.