Hi,
Following are some website design ideas :

1. The first rule of business website ideas is your website has to be attractive. Nobody wants to look at a mundane boring web page.

2. Make the website as colorful as possible with bold graphics and animations.

3. The design of your website must enable easy navigation. Inscrutable terminology and will worsen your problem of making business out of the website.

4. Since it's a start up and you don't want to spend a fortune in making a website, I suggest, learn the basics of website designs.

5. The important aspect while learning how to make a business website, is to make it participative. This way you will get the feed back, which will help you for further improvements.

Authenticity of your content is crucial to maintain the customer base and for increasing it too.