RMS hardware ...can... be intimidating at first. But I'll tell you what.... the first time your bird goes off with RMS..... it's a whole 'nother country of rocketry. You BUILT that engine. It's so cool. It also opens up so many more options for power choices. You just can't get the same options with SU (Single Use) motors.
One hint..... for the smaller RMS - the 18mm, 24mm, 29mm/40-120, and the 32mm - get something like a box top to use as a container to work in. I get a lot of boxes from work that the Xerox paper comes in. These boxes are pretty handy for transport and storage of rocket stuff, and the box lid makes a great container / work table to use when assembling the smaller RMS hardware. Use the box lid in an upside down position so that you have the two inch lid rim to contain all the small parts. That way they can't blow away or roll away.
Most of the smaller reload kits have all the components for 3 reload flights. The first thing that I do when I open a new reload package is to sort all the parts. Propellant grains in a little pile, the various size silicone sealing rings each in their own groups, the case linings, the delay linings, delay spacers (if there are any, some reloads need them, some don't), etc. When I get all the parts sorted, I take one of each part and put it in another pile. Then, take all the remaining parts and put them into one of those resealable zip lock sandwich bags. This does two things, 1 - keeps them moisture free, and 2 - keeps them safely together. Try to squeeze most of the air out of it when you seal it.
Then, take your single set of reload components, and the instructions, and assemble your reload. Pay attention to the instructions, take your time, and you'll be fine. When you finish assembling the reload, be sure to put the instructions into the zip-lock bag with the other reload components so that you'll have the instructions handy for the other reloads.
And you will have an incredible feeling of accomplishment when that bird lights off.
Yes, Phil, given half a chance I'll turn you into an RMS-only kind of rocketeer.
If I can get you to Whitakers..... once someone with any interest sees, hears, smells (luv that AP) and yes..... FEELS a few HPR launches..... there's no turning back.