http://www.hawkee.com/phpBB2/viewtopic.php?t=14462
Give that tutorial a shot. It's meant for beginner scripters. Also, look in the tutorial section of any mirc scripting site and you will find tutorials on quite a few individual subjects.

RusselB has a great point with the help file in mirc tho. Even the most experienced of scripters rely on the help file all the time and for a new scripter, typing /help /command like /help /echo or /help $identifier like /help $chan or /help feature like /help On Connect, is one of the best things you can do to learn the ins and outs of the commnds, identifier and everything else you can do in mirc.

Good luck and keep at it.

I've gone to look for myself. If I should return before I get back, please keep me here.