I am now 15 years old and determined to be a field photographer. What should I do?

Field photography is usually a contracted master or freelance photographer. The former is paid, you just need to ensure that you can produce works, but it is not so easy to become a master. The latter needs your own backing, the purpose is to become a master and let others pay for your work.

What is indispensable for both is to keep paying and find someone who appreciates you.