After buyers make the payment, they will automatically be taken to the download page where they can download your product.
If you have hosting space on any server, I can use that to setup your sales page. Or else, I can setup a hosting account for you. Please see my Gig Extras for these options.
I also offer a complete package where I create your sales page, host it, design your eBook's cover, set up the shopping cart or Payment Gateway, and pretty much take care of the entire sales funnel. Just let me know your requirement, and I will do the rest for you.
I have sold many of my own eBooks online, and so have plenty of experience in setting up eCommerce solutions.
You can focus on creating your content. I will take care of the technical details of selling it online.