Good goals but I think you're doing several things wrong here.
1) Attempts to pose this as an external tool. Not many people who visit the wiki will ever
learn about the external website. You're effectively opening a new contributors influx
channel while not making the life of people who reached Wikimedia project as readers much
easier; they still lack orientation as to what they can do for a project.
2) Excessive focus on the "getting in" part of the contributor life-cycle. There
really is too much routine in editing articles today and it hinders current work by making
things too complicated, slow, unintuitive. I tend to encourage focus on the "I am
editing, but it is inefficient" part of the work. It is very very very
under-developed.
As such I would encourage that you look at the wiki layout and editing tools closer and
come up with something, like a user dashboard perhaps, with 3 sections ('my tools -
prefs, watchlist', 'my pages - user page, talk page, contribs', 'getting
started - <whatever you fancy here>').