The process and procedure for getting a single pilot Part 135 certificate is remarkably simple and straightforward.
If you send me your e-mail address, I can send you the entire FAA package to do this. Your local FSDO will also have every bit of information regarding the process, including a useful video!
Your next step is to get into your local FSDO and find out who your Inspectors are going to be. These people generally will provide you with every resource you need to obtain your goal - they are free, have the experience and knowledge to help you, and will be the key to the success of your operation.