Where can I learn to draft online?
I would recommend http://www.channelfireball.com/all-strategy/. They have videos of expert player drafting and playing, which are a great (and fun) way to learn. Luis Scott-Vargas set reviews on the same site are also great (e.g. http://www.channelfireball.com/articles/magic-2014-set-review-artifacts-and-lands/).