new payment gateway

Hello people,

I'm on latest Zen.
I need a payment gateway,
that during checkout and when a customer wants to choose his payment method
if he choose a creditCard method, I want my Shop (ZenCart)
to direct the user from the shop to our local bank gateway,
showing the amount of cart and method of paying if he wants a credit
(visa..master..etc..or cash card, (Knet, visa elctron..etc..) and the bank will
handle the rest..

Can i personally do this?
or I have to ask some help,

sorry but in this area, i''m a blank mind!
Any advice Please ?
Any headlines or help what to do and where to start?

Thank you so much.

Look at the way that 2CO or one of the other 'offsite' type modules works.