Cncphotoalbum.com has some good stuff on tuning your rig. Even youtube.com has some decent starter video on it.
Specific to your boat, be sure the mast step is in good shape. If it's not, the mast may even sink a bit under heavy loads like beating to windward in heavy air.
If you don't mind spending a little dosh, find a personable rigger who works or maybe crews on a race boat in your marina. He might be willing to give you an hours time when he's already there to help you tune your rig and teach you the basics.
A hundred bucks cash and you pull and replace all the cotter pins
You might learn alot.