Start from the summary then follow the intro https://riskfirst.org/overview/Quick-Summary

They could have layed-out the articles better than this.

That should definitely be the first page you see. Instead, I never even found it. Thanks.

I like the moto, "do the hardest thing first", that way if it turns out something is impossible you know this as soon as possible. One caveat is that it only works for known-unknowns.