I’m not going to lie: plumbing can be annoying. But it’s also just grown-up Lego with water. You’ve got this because the hardest part is usually just crawling under the sink.
Grab a flashlight and a bucket. You’ll also want a big ol’ towel because water has a sense of humor and loves to sneak out. Oh, and patience—buy a six-pack of that.
Before you touch a single nut, turn off the water supply! Find the little valve under the sink (usually a chrome or blue knob). Twist it clockwise like you’re opening a stubborn jar—but don’t break it.