Yes, you have to attend a massage school but you have to know what are the rules and regulations for the State that you would like to practice. If you want to consider a career in the military, perhaps you can consider offering massage services to military personnel or retired (geriatric patients).
There are a lot of options in this wonderful industry.
There are also career and guide books for massage and spa therapists:
The Massage Therapy Guide by Steve Capellini
The First Book on Spa, Massage and Wellness Resource Book and
Career Guide
http://www.scribd.com/doc/6425282/About-the-Book-Spa-Massage-and-Wellness-Resource-Guide-and-Career-Book
(this has the most comprehensive list of training centers in the Philippines and abroad with tips from professionals and employment opportunities, legal laws and regulations including the 25 States in the United States with legislation, list of employment agencies, how to choose a trainer, and information that you need in order to succeed in this industry and before you shell out money for your tuition or training. This book will give you the information to start right in the industry with secrets you should know and being able to find your rainbow in the wonderful world of massage, spa and wellness.
Both of these books are available online and via Amazon.
Hope this helps.