I am an computer network engineer with about 20 years experience and I have recently entered the Internet Marketing business. After being made redundant a couple of years ago I decided that I wanted to work from home and earn money from the Internet. I had heard a lot of accounts of people making a good living from the Internet by setting up websites and selling affiliate products (other people's products), so I decided to try it for myself, this is also a good starting point for you.
One of the best things about affiliate marketing is that you don't need to have, store, or keep any stock for any of the products that you promote or sell. Many people start off their Internet Marketing business by promoting Amazon products.
There are many forms of Internet marketing, examples of this are, Websites (creating and/or selling), Social media marketing (especially Facebook), Youtube video marketing, using paid advertising like Google adwords to target specific demographics and interests, etc. Using a good paid traffic method or creating Youtube videos are probably the 2 fastest ways to get targeted traffic to your site or product, but you do need to know what you're doing.
The one thing you will need if you decide to become an Internet Marketer is a website/blog so that you can promote information about relevant products to your customers and clients. This is done to build trust and a strong relationship, and one of the easiest platforms to use to build your website is Wordpress.
I have uploaded a very good training course for you, it will give you a good grounding and foothold for setting up an online website business or blog.