Can I Bypass Most Things? I Only have One Service a User can Buy, Please Help

[G9Cap]

Hey Guys,

First post for me and I hope I am in the right area, I don't want to do anything wrong and I have tried to find the answer to my question elsewhere but without success.

I'll try to keep this short.

The site I am working on will offer one service and that's it!

First, I have a new merchant account and it processes using Authorize.Net
Trying to figure out The Direct Post Method in Authorize has been a joke and someone told me to try VirtueMart.

People will use the site and if they want to purchase the service (which will be heavily shown throughout the site) they simply hit a Buy The Course Now button and go straight to a checkout page.

No putting anything in a cart, no looking at multiple items all over the place, they would just say yes to buying and go check out.

IS THIS DOABLE?   AND HOW??  (I really have no need to publish all the items of VM)

Oh while I'm at it, can the checkout page also sign them up for like a silent registration for the actual site too? (similar to Amazon, you can check out for the first time and it creates you a site account at the same time)   ??

Thanks so much!

Mark   

[G9Cap]

Nobody can help?