If you start a profession like blacksmithing late, it isn't that big of a deal. You already have access to lots of materials to raise your skill quickly.
Now if it was the other way around, and you started mining later... then you have to go to the newbie zones to mine copper etc.
So, in summary. Go skinning/mining to get money if you like, then go smith if you feel it's a good choice (If you find a good guild, skinning/mining may be a better option... supply the guild crafters, and have them make you anything you need ;) )