Inscription or Alchemy?
When you hit 90, level Inscription. Alchemy is great if you plan to raid but Inscription makes more profit. I make gold with Inscription and I save gold with Alchemy.
Save rare herbs like Goldthorn for Alchemy. Use all the common ones for Inscription.
Try wow-professions.com for ideas for the best path to level.
I'd wait until you get closer to 90 before worrying to much but once you reach that level I'd be happy to explain negatives and positives of all of these professions.
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