@Nancy The only way to get comfortable with taking them apart … wait for it … is to take them apart, ALL the way apart. When I started working on 1911’s there was no internet and the Brownell’s catalog was 50% 1911 parts. One of the first things I did was to get a book "The Colt .45 Automatic: A Shop Manual by Jerry Kuhnhausen. I read it cover to cover and kept it handy as I learned about the pistol and it formed the basis for my method of modification. He produced a 2nd book “Vol II” of the same name. Good addition to his previous work. I highly recommend both if you are serious about 1911’s and have any intention of trouble shooting issues or modifying one.
A thought for making the slide disassembly a bit easier is once you get the critter apart is to put a slight chamfer on the back side of the “ears” of the barrel bushing. It will make getting the bushing over the recoil spring plug easier. Remember turn the bushing CW to get the plug/spring out THEN CCW to get the bushing out.