Preface: I HATE HATE HATE plumbing. And I suck at it too. Also, I'm 5'4", 110 pounds of weakling female who was never taught plumbing. Keep this in mind.
My bathroom sink faucet stopped supplying water. Probably corrosion, that's what killed the other faucets in the house. So I bought a new one (1st trip to store).
I managed to replace the faucet fine. Had to take the drain all apart to replace the stopper, but my plumbing tool that I do not have a name for was too small. My neighbor who is very kind and has all the tools and lets me borrow them wasn't home, so I went to my friend's house 10 minutes away to borrow a bigger one. That one worked and proceeded to remove and put in the new stopper.
The stopper obviously wasn't water tight so I had to get the plumber's putty (2nd trip to store). When I tried to reassemble, I discovered that the bendy piece connecting the u shaped piece to the actual sink drain stopper piece was cracked. The u shaped piece was full of gunk, and it had a crack at the top too. So I had to replace it as well (3rd trip to store).
Put everything together, and the bendy piece was clearly not sitting right. It was leaking just a tiny bit. And the u shaped piece was hitting the bottom of the cabinet. Clearly not right.
I'm assuming I got the wrong sizes or something, so wait until the plumbing supply store is open. They have actual plumbers who help you, and they are not mean when you're a plumbing idiot (obviously, bendy piece is not the accurate name). The nice plumber turned store person looked at the picture and told me that I had the u shaped piece backwards. And didn't even laugh. (4th trip to store)
So I came home and took it all apart and turned the u shaped piece around the other way. Put it all back together and run the water. It's not leaking anymore! It's looks kinda wonky and I'm sure that anyone who actually knows what they're doing would tell me it looks horrible, but ITS NOT LEAKING and YOU CAN FIX IT YOURSELF are appropriate phrases that will be screamed at them after this whole mess.
I fixed the sink. That is now the 4th, and last, sink in the house. I am done with sinks. I am not going to even attempt to replace the toilets. I will hire a plumber for that.