I just don't have the time nor the resources to do all this training.
Simple things will increase your level of proficiency with manipulation without you even realizing it. Every single time you load a magazine into your weapon, do it exactly the same way. I prefer to bring the pistol into my workspace, stay focused on the target and load the magazine with a "flat to flat" method before sending it home. Every single time I put a magazine into one of my pistols I do it in a proper firing stance and do it exactly the same way.
The other thing is dry firing. Spend a few minutes dry firing when you can (setting a time/day limit works for some people, some people do it when they can). There is nothing saying that you can't practice clearing malfunctions when dry firing.