There is one right on this website, just go to the walkthrough sub and search for clannad.
You can also google it easily.
As someone who've read clannad, yes, it is really confusing, and clannad is kinda considered a choice hell in term of difficulty of chosing things.
This comes from a huge steins;gate fanatic.
Chaos;Child is on par with Steins;Gate in term of pure quality, even better in some ways, and while it won't take the place of Steins;Gate in my heart.
BUY IT!!
Hehe, i'm going to start Fate/Stay Night.
I've waited 4 years, 4 years since i started VNs, but finally, i'm playing Fate/Stay Night.
That's why i didn't play all the highly-rated VNs, so i could play them whenever i want and be mind blown.