Most systems come with a YouTube video and a manual full of threats. I recommend watching the video first, then ignoring it. The hardest part is drilling a hole in your counter if there isn’t one—but you can also use an existing faucet hole. That’s intelligence.
Pro tip: If you see a red tube and a blue tube, and you forget which is which, just lick them. The tube that tastes like regret is the waste line. (Don’t actually do that. But also, I’ve done it.)