Need to streamline checkout prosess

[bozhenko]

Here I did try to ask for it about an year ago. http://forum.virtuemart.net/index.php?topic=125529.0
Now bumped into the same case again. But can't see how template override would be of any help...
One or two times an year I sell online training courses access tickets. So, nothing to ship, nothing to download and nothing to register my customers on the site for.
Ideally, the workflow for customer should be like this: They arrive at the landingpage (virtumart items list (in certain category)) and it doesn't matter if they are registered with my site or not, select which level of that training they want to buy by clicking on an appropriate item, add it to cart (second click), proceed to the cart (third click), put in Name and email and click "Confirm order" (fourth click) and the system takes them straight to the payment gateway where they pay and come back to site when done there.

Now it's ridiculously difficult even for me – I have to do almost a hundred of clicks to get to the paygate finally. And my clients are NOT web-developers, so for them it's simply impossible to get through all these debris of useless stuff.
To my regret, the paygates in Russia do not work like the shortcode buttons of PayPal that you can use for checkout even without Virtuemart or any other "shop"-add to Joomla, otherwise I even wouldn't need to install Virtuemart – so, how do I streamline the checkout in such a way that it makes Virtuemart usable for people, who are way below web-devs in their browsing skills?
Thank you all in advance for tips and how-to's.
PS. I am not really a web-developer myself. But can do a little tweaking to code when needed. And I am on Joomla 3.4.1 with VirtueMart 3.0.8