You could go to Primary Cooking Master in Carefree and Wu Long Village to learn and upgrade Cooking Skill. Buy recipes and materials from Primary Cooking Master and cook items when you have enough material. You will get some cooking EXP while carrying on your work. When your EXP is full, system will remind you to upgrade your skill, and it requires certain amount of money. When you're qualified, you could go to the advanced cooking master to learn higher level cooking skill.