video wasn't bad for your first edit, just a little over-exposure and pretty much what everyone else says.
as far as the vimeo specs and converting and what not, if you have final cut pro you should have compressor? when i export i go straight from prores422 and just go to >file>export or cmd+E and it should export the video in its uncompressed full quality form. this should be a big file. then you can bring it in to compressor and it should already have web preset specs in the program. abe k explains it pretty easily and this works for all footage for the most part - http://www.youtube.com/watch?v=5TtXN5iKyH0&feature=channel_video_title
and as far as vimeo plus goes, i just have the regular version and i have never had quality problems at all. i would recommend to learn to get the most quality out of your videos before upgrading right off the bat. then once you have your workflow fine tuned and you can crank out high quality videos like they're goin out of style, then upgrade if you feel it necessary. the quality difference is hardly noticeable between regular and plus if you know what your doing