The basics of ITA isn't really complicated and I'm a little bit of a technophobe too and I am always very grateful to those who post screenshots on the BA Tier Point Run thread that is worthwhile studying. I'm more a visual learner so these for me are extremely useful.
There is also the travel tools forum and threads about how to use it etc. Worth investing a little bit of your time in and looking through the pages. Of course not all but the screenshots are very quick to search through to see any given format.
ITA Software Matrix Airfare Search Consolidated Information and Help Thread