the wish for a step-by-step guide is coming up repeatedly and is definitely what is missing for new users.
It would be really great if someone in the community would take it into his/her hand.
That doesn't mean that it needs to be written solely by that person, we just need someone who will coordinate this a bit
(with hopefully other people helping out) to make sure it's consistent and be persistent enough to see to it that we actually have a finished guide at the end.
Basically don't by shy about editing wiki pages, be concise (also have the courage to actually delete some outdated info or move it to more appropriate pages), be persistent...
If there is something unclear, make a note in the wiki and ask on the list.
Maybe you? Yes, you in front of the screen there ;-)
Different pages were started with intents similar to this, but never finished:
GettingStarted pages, which should be merged into one.
A lot of the information there is also redundant and can be probably removed.
E.g. there is probably no point in duplicating installation instructions, unless you think it really helps.