While you have not given the details of your material, I am more than willing and enthusiastic about getting to read your material, and, in agreement with you, shaping it in a way that best delivers the message you are trying to put forward. In the sea of other freelancers, I believe the quality you are looking for is what sets me apart: for me, proofreading is not only about correcting obvious grammatical and spelling mistakes. It is also about putting in effort to understand what the person was trying to say, and delivering this message in the most effective manner possible.
I believe the best way of achieving this, in your particular case, is that we have as many edits as you wish; I could begin by reading it and doing some basic proofreading; afterwards, we can discuss some parts that I maybe found hard to understand, and come up with a clear idea of what you are trying to say. I would then finalize the work and you would once again check it and see if you need any amendments. Naturally, if you wish that I work more independently, I am absolutely fine with that too. I can just do the proofread, see if you have any feedback, then correct any mistakes that I may have.
I am also completely fine with signing a Non-Disclosure Agreement.
Your project sounds really interesting and I would be happy to be a part of it. Please do not hesitate to contact me if you have any further questions.
Warmest regards,
Marija Simeunovic