I am a rank and file amateur but after 3 years of learning more and more I can build a decent pistol. I started by trying to tune extractors! Then the next thing, and the next... After learning to peen and refit frame to slide for less rattle, I imagine having a Caspian setup to fit will be gravy on the biscuit! There is enough information here on how to fit damn near anything. There are tons of skilled persons and utter pros here that are more than willing to guide and instruct in damn near any aspect of the 1911. I have many multi-page threads of fitting extractors, sears, grip safeties, barrels, etc. that started because I asked a question. It is an addiction and I wish I had found this 20 years ago! I told my wife that I wanted a high end 1911 for my retirement. Still do, but my goal is to build a $10,000 1911 myself. I have ten years to learn for that time! LOL.
Start with a good base gun. Like a Tisas - my best started as a on sale 320 buck A1 Service Special that ran fine after extractor tuning. I decided to build it up. It is an amazing pistol now! Not perfect by any means, I made some small errors on the grip safety, but I learned tons and tons. Don't rush, get tools, enjoy it, and don't be afraid to ruin a part - you will.