1. Can I generate quality documentation and have at least two other people in the R&D group review and approve them?
Yes, you can generate quality documentation on your situation. Design and development for medical devices have to deal with relevant regulations, product safety, and risk controls on product defects in addition to the usual application requirements, specification requirements, and end-customer needs.
Of course, if you do not have certain processes (for example sterilization, or your product is not software), then there is no need to prepare and have those documents in your quality management system.