Hi Greg, Don't worry, we've all been down that road. It wasn't until recently I actually started being "good" at programming drums.
I can't really point at any tutorial since I learned it the hard way, but I can say that when you program drums you do it in midi (of course)
Midi notes works like this:
Duration of the note (Quarter notes, sixteenth notes etc, even triplets)
Velocity of the note (in midi it's from 0 to 127. 0 is not hitting the drum at all and 127 is like hitting the drum really HARD)
I often use 120 in velocity when doing "normal" drum hits.
Everything is laid out on a virtual piano roll or "piano keyboard"
Very typically the kick drum is traditionally the note "C1" (there are many C notes on a keyboard, so they have numbers to get things organized)
The snare is D1. The Hi-hat, toms and cymbals vary from Drum program to drum program, but just look for them and you'll memorize it.
I have never programmed midi in Reaper, but should be the same in every music making software.
Start of by making a normal drum beat in quarter notes (1/4) having four hi-hat hits, one kick in the beginning and a snare hit at the third hi-hat note.
Superior drummer actually has "grooves" that you can drag and drop in reaper, you could learn from that.
this is EZ drummer in Reaper, but it's almost the same thing:
https://www.youtube.com/watch?v=DvEk7-tSlhQ
Since you have superior drummer, you should have couple of drum mix presets, use them to make the drums really cut through the mix
Ableton live 9 actually has a very cool feature where you can convert audio into midi, so if you beatbox it in a microphone, Ableton analyzes the audio and converts it into midi through a audio to midi drums algorithm. (amazing eh?)
Should get you started