You can start right now marketing information products. You do not have to wait until you have written your own. There are ebooks on hundreds of topics, including
Health & Fitness - Business to Business - Home & Family - Computing & Internet - Money & Employment - Marketing & Ads - Fun & Entertainment - Sports & Recreation - Society & Culture
Register with ClickBank, one of the most popular market places for information products. Join the ClickBank Affiliate Program . They handle payment processing, your commission (typically 25% to 80% of the purchase price), and are a central search location for finding ebooks your customers want.
Search here for articles and ebooks that are already written that you could market, starting your own knowledge publishing business! Then I can walk you through setting up web pages promoting these products.