Hi Evans,
Taking PMP exam needs a real focus and interest. You need to make commitment to yourself in order to motivate and prepare accordingly. Once you make up your mind, the enthusiasm will drive you.
Start reading the PMBOK guide topic by topic, summarize, discuss your learning with friend, colleague, and/or family member. This will help you hone your learning, then move to Rita's book, or Eileen's book scan through and take free exam tests that are available in the web to practice varieties of questions.
Also, PM Precast Exam Simulator and Tips provided by many people in this forum will help.
Nothing is impossible in this world, people have gone to moon/space and returned, where as this is only a PMP exam. You can do it, go for it.
Thank you,
Prakash