I am caveman, hear me roar!!!
Hahaha. Once again, I am pleased with myself.
In preparation for getting a new roommate, I wanted to change the doorknob to my bedroom to one that can be locked.
So recently I went to Orchard Supply Hardware to buy a new doorknob, and tonight I took out the old one and installed the new one all by myself. I had never done that before. And I didn't even have to read the instructions.