I have produced a number of pdf files which you can download for free covering
some aspects of computing within a small business, home office or charity environment.
They range from simple two page outlines to slightly more involved introductions.
What they have in common are they are bite-sized and won't require great expertise
Free report on Networking a Small Business
Free report on Online Security
Free report on Broadband
Free report on Email
Free report on Small Business Software
Free report on Ten things you need to consider to get your website navigation right
Free report on Blogging For Business Or Pleasure