First, good idea to put the switch in a floppy plate incase you ever deside to change it later.
I can do insane mods now because I have more than 30 years of experience of fixing/tinkering with stuff. I had to start somewhere and I remember my mom crying saying "I cant buy anything because you take it apart"
When I first started messing with computers a couple of years ago I destroyed the first 3 or 4 (free, donated Pentium 1's) before I figured them out.
best way to learn is to get out tools and work....
And above all have fun and take pride in your acomplishments.