Having played around with "work at home" offerings lots of times at different points in my life, I`ve learned a single and basic lesson:
If it`s easy enough that someone can tell you how to start a work-at-home business, then it`s easy enough for you to go out and start it in your neighborhood without all the other advice.
If getting paid for typing is that easy to accomplish, then you should be seeing many opportunities in your own local area.
The problem is twofold. The first is that ANY work can be done by someone starting their own business, IF you can become visible to the people who want to pay for that work.
The second is that being "seen" by the particular people looking for your business is rarely explained in any of these so-called instruction courses.
If you could figure out how to quickly become visible with whatever you offer, you`d have the $1-million solution to life! :-) Since few people have that solution, the people writing these instruction manuals only describe what "could happen" IF you happen to figure out how to become visible.
A better idea is to visit your local college and either take a degree or audit some courses on marketing. Then apply what you learn to yourself.