Calvin,
Internet marketing is a pretty broad area; I'd suggest focusing on a smaller area to start and then broaden out. For example, specific areas of internet marketing include:
- Search Engine Optimization (SEO)
- Pay Per Click Advertising
- Email Marketing
- Article Marketing
- Social Media Marketing
- E-commerce
- Online Lead Generation
Like any small business person, you probably have a limited amount of time/resources, so I'll make a suggestion. Creating a credible website is the first thing most businesses should do. Generally, this can be done cost effectively and will pay big benefits in the future. Therefore, a general understanding of SEO, web design and usability should be your starting point.
Here are a few sites where you can get your "feet wet:"
If you need any help, shoot me a message. I blog at Dinkum Interactive's Blog