Oh, all the greyed out optioned you can select if you've done the appropriate prerequisites. There aren't any "locked out" options as far as I recall.
As far as guides, I'm working on them slowly and will make them public once they're up to date. Probably in the next couple months or so.
Although a wiki would be neat. My only concern is like... people putting assumptions or false information on there that could mislead people, and that's something I don't have the time to manage alongside everything else.