By all means, good luck!! it's not as bad or as hard as it seems and you're going to find that as good as your plan may be, trial and error is going to be one of your best friends for the next few months. the best advice i could provide is:
sweat the details
keep it original
mind your sizing and content margins
if it doesn't look good to you, it won't look good to anyone else
avoid looking at other skins while you're developing
did i mention sweat the details?
most important - make what YOU like - in the end that's all that matters