Postscript is actually really easy.  The language itself is RPN based (like the older HP calculators) and really fun to work with.  Grab a copy of the &quot;Blue Book&quot; (do a google search for Postscript Blue Book and it should be one of the first links) -- it has a lot of good examples and exercises in it.  Should take about a good weekend to get the feel for it, then just keep a copy of the function reference from the end of the book printed out.