Easiest thing I can think of is to build a list to start. Once you have that list, you can push your own products to the list.

Easiest way to build a list is to give away freebies. Considering your a web designer, perhaps a pack of 25 minisite templates would do you well. Also, instead of just throwing up a simple page with an opt-in to receive the templates, take it a step further. Go the full route and create a sales style page, it'll convince more people to opt in, and will provide you with practice.

If you really want to get a big following, and have a bit more time, offer a free plr package, including templates, a sales letter for the templates and so forth.

By giving away the freebies, you will be able to build a huge list.

The only investment you'll need is the mailing list and somewhere to host your site.

The initial page itself won't make a lot of money, if any at all, however that list can push sales letters repeatedly.