First, you may want to reconsider the use of full-length .38 Spl cases. Longer cases have the potential for more cartridge "flop" in the moon clip and thus slow loading. .38 Short Colt or .38 Long Colt are what are used primarily in my area. Long Colt gives you a little extra room, which makes it easier to make PF.
Next step is to find the right moons, that hold the brass you have selected to use with a minimal amount of the aforementioned "flop". Then some type of moon clip holder - I favor the North Mountain 4-post holder, but other options are available. A good holster and belt system and you're good to go.
Have fun, be safe.
Adios,
Pizza Bob