There are basic requirements in order to become eligble to take the PMP exam. 

To apply for the PMP, you need to have either:

• A secondary degree (high school diploma, associate’s degree, or the global equivalent) with at least five years of project management experience, with 7,500 hours leading and directing projects and 35 hours of project management education. 
  
  OR 
• A four-year degree (bachelor’s degree or the global equivalent) and at least three years of project management experience, with 4,500 hours leading and directing projects and 35 hours of project management education.

Start reading these articles might help you. Link

Start by reading the experiences and LL of other PMZilla members here. it will give you  a very good idea on how to get started, what books , mock exams to use, study schedule , duration etc.