My and a small team are in first contact with investors. We're considering using (the equivalent of) a SAFE agreement to receive first investment. We don't have a legal structure though, and ideally we'd use some of the first investment money to get some advice about how & where to properly setup the legal structure.Is this possible with a SAFE agreement? Can it be signed / backed by a person? Or does it have to be an agreement connected to an existing legal construct?