Just go to the menagerie and give the lady there 15 gold z coins. I got one on my ranger today and leveled it up to 20 with balth. faction. You don't need a license.
You shouldn't spend more than 30e for a Panda License. 1 gold z coin= 2 ecto. 15 gold z coins = 30e. Just buy the z coins and do it that way. much faster.