After reaching lvl 10, click "N" and select the talent you wish each time you level up.
Broadly speaking, gathering professions make you money and production professions will cost you money. For enchanting you will need green items to disenchant. If you go the money making route, skinning/mining is the best.
The question is not, Can they reason? nor, Can they talk? but, Can they suffer? ~Jeremy Bentham
