A provisional application is just a placeholder in order to secure your priority date. This is important since the law is now first to file.
You're better off filing a provisional application that is as close to your final application as possible. Meaning, don't just file power point slides or notes or raw data. Write up a full and complete application. You have a year to finish development and update the provisional application with any new information and file it as a non-provisional.
And hire a professional - either a patent attorney or a patent agent. I am a registered patent agent. There is a reason why you have to pass an exam to practice before the USPTO. No matter how novel and inventive your invention is, if you don't understand patent law and what the USPTO examiners expect, you're going to have a hard time being successful.