Good day,
I hope you are not expecting too much and/or the design to work given what you are planning to provide to the vendor. In the end... garbage-in results in garbage-out. There are far too many variables and details needed for a successful design beyond a block diagram style of schematic, let alone a successful and quality PCB layout. If anything I would suggest you create a formal schematic detailing all the parts/connectors (complete part numbers so as to know the part footprint), all of the interconnections, and include PCB layout notes (critical traces/lengths/layers used, PCB physical size, layer count, mounting holes or not, soldermask/silkscreen color... and PCB stackup if more than 2 layers, etc) and/or design documentation package.
Ultimately, the more info and details you provide will increase the chances of having a working PCB and/or a PCB that meets your expectations.
Cheers,
Sam