For that reason, you're probably less likely to focus on ‘leads' in their traditional sense, and more likely to focus on building an accelerated buyer's journey, from the moment someone lands on your website, to the moment that they make a purchase. This will often mean your product features in your content higher up in the marketing funnel than it might for a B2B business, and you might need to use stronger calls-to-action (CTAs).
Internet marketing is the job of creating a convincing message that attracts customers to an online product. Successful online marketers come from a variety of backgrounds, including business, graphic design, writing and IT fields. You can find resources on the web to learn more about Internet marketing. Try taking on a small initial project and add the results to your personal work portfolio. Use the portfolio to interview for jobs in the field, or to find work as a freelancer.