Information products mean everything from documents, reports, electronic books, videos, training programs, coaching, courses and all other related ones. If you think of following this route you need to assess yourself first and see what market niche you can tap in. Of course, it will be extremely interesting to start writing about everything you can imagine but between you and me you know that this is not quite possible.
Also, because you will market further as an expert in that domain or market, you simply can't be an expert in everything. Search within yourself and feel which are your inner passions and also assess yourself regarding your strengths and skills.
Basically you want to start a business out of selling information products. And a business is a vehicle between the offer and a demand in the market. The demand can be real or, if you have a million dollar idea, it can be created and the customers will jump on it.
After you know what are you up to and how you can bring value to the market it comes the next step: research. The research will identify if there is interest in the market for similar product like yours and if people will buy once they will find them online.
I can tell you from my own experience that it doesn't make sense to start putting all efforts and resources in a niche where people expect to find online free stuff and they are not interested in opening their wallet to buy. It will be a costly mistake to enter such markets. Also, the most competitive ones as internet marketing and w***** l*** for example have plenty of buyers but also plenty of sellers and due to this fact it will take you as newbie a lot of time to start and see some results working for you.
Monetisation has to be a result and not necessarily the primary goal. You know, there is quite a mistake and most of us fail by doing this to pursue only monetary equivalents. The focus should be in offering as many value possible to the customers, to the marketplace and both awareness, great feedback and sales will follow in a short time after.
People search online for information and accept the fact that some of the information online is free and some needs to be paid. Usually the trigger for paying to buy any information products comes from having an urgent need to solve a problem which can be health related, prosperity, personal development and many others.