You could choose to learn manufacture Soft Armor, Fine Armor or Cloth Armor. You could go to Primary Manufacturing Master in Carefree and Wu Long Village to learn and upgrade Manufacturing Skill. Buy recipes and materials from Primary Manufacturing Master and manufacture armors when you have enough material. You will get some manufacturing 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 your qualified, you could go to the advanced manufacturing master to learn higher level manufacturing skill.