Programming is difficult to get started with. Many people start doing it with a specific goal in mind like yours.

What is your background right now with web developement? How familiar are you, for example, with the content of http://www.w3schools.com/?

You should start by making sure you are familiar with content of that website. Especially make sure you at least understand the basics of HTML/CSS/Javascript. It's the basic information needed to understand how webpages work.

If you are familiar with the basics of making web pages, I recommend taking a look at this documentation page: http://reference.wolfram.com/language/guide/CreatingAnInstantAPI.html

The wolfram language provides some unique tools for creating quick APIs that can power your website.