The USPTO itself provides guidance on the patenting process at: https://www.uspto.gov/patents-getting-started/patent-process-overview.
I strongly recommend you NOT to commit to paying any money to ANY invention promotion firm. Instead, I recommend you investigate obtaining the advice from a registered patent professional (a patent attorney or a patent agent). Many (myself included) provide extensive free initial consultations and can explain the steps required in applying for and obtaining a patent. Note that a patent registration is a nationwide license, so you are not limited to consulting with patent professionals in your immediate area.
The U.S. Patent and Trademark Office provides a list of registered practitioners at: https://www.uspto.gov/learning-and-resources/patent-and-trademark-practitioners/finding-patent-practitioner
For cautions about invention promotion firms, please see my web page at: https://claibornepatent.com/prototype.htm.
If you wish to discuss this matter with me, you may contact me at the number below.
In any case, I wish you the best in this endeavor.
Anthony Claiborne
Claiborne Patent Law Services
425-533-6132
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