Howdy Briscojr and welcome!
The guns you have should be fine to start with. '92's sometimes are finicky about the cartridge length and bullet shape that they will reliably feed. If yours functions okay with what you are feeding it, you are good to go there. If not, you may need to feed it something else or it may need to visit a good '92 'smith. Most of the faster guys like 18-20" barrels, but longer works fine and some folks find that the longer barrel holds more steady for them. As for pistols, again the faster guys usually shoot "matched" pairs. But lots of folks also shoot mismatched pairs because that's what they have, or they just like the variety. My first four revolver purchases for CAS were a 5 1/2" .44 Spcl Colt, then a 4 5/8" .45 Vaquero, then a 7 1/2" 1st gen Colt .45, then a 7 1/2" '51 Richards-Mason .38. Had great fun mixing them up. Later I got matches for all but the Vaquero (turned out I liked the Colt style better). So even though I have matching pairs now, I switch between them which is still not the best way to get real fast, but I don't care and don't have the time or ambition to practice enough to be real fast anyway.
If your ambition is to become a top shooter as soon as possible, get a matching pistol and a '66 or '73 or Marlin rifle and practice, practice, practice. If you want to just have a lot of fun and progress at your own rate, shoot what you like. If you stick with the game you will be buying lots more guns later anyway