The initial startup process is going to be the hardest. You won't know exactly how to set things up how you want, but that's okay. Keeping your scope relatively small initially will help breaking everything down into digestible bits.
"I want to make my Shaman heal and slow"
Then set up you ini to heal your Monk at X%, and slow enemy NPCs at Y%
Once you have that squared away you got the foundation to add your Shaman DPSing. Add some DoTs and Nukes to the mix. Then get them summoning their pet. Each extra bit gets you closer to fully understanding it all.
Even years later, using RG for various things I still turn to some of the masters here when I get stumped on something.
What level is your Monk/Shaman? There are some pretty good already made ini files for most classes at 5 level intervals that you can download and run right away in the KA ini Library.