Reaper has a pretty steep learning curve alright but the trick is to set up a template with your prefered settings so when you want to record all you do is open it up and start straight away. My basic template has the following:

Track 1: midi set up with the drum VST (EZdrummer)
Track 2: Mono - Rhythm guitar - hard panned right
Track 2: Mono - Rhythm guitar - hard panned left
Track 3: Mono - Rhythm guitar - middle
Track 4: Stereo - Rhythm guitar - centre
Track 5: Stereo - Lead guitar bridge
Track 6: Stereo - Lead guitar - neck
Track 7: Mono - Bass centre

I add any extra harmony tracks as required, the number of lead tracks depn on the effects used (delay, reverb etc).

If you use the same set up every time you can even customise the voulme levels and EQ so that everything comes out mixed as per the template. Very handy and a huge time saver.
Hope that helps!