How do junk removal businesses build systems and processes as they grow?

I co-own a junk removal company in South Carolina. We have seen fairly rapid growth over the last 3 years and are now looking to create more structure within our business because we are approaching the size where we can no longer handle all of the management on our own.

We are trying to write down systems and processes to build an operations manual/playbook, buuuut neither my business partner nor I are gifted with systems/organization/implementation...

Does anyone have any good advice on where to start, especially for vision/big picture-oriented entrepreneurs?

Thank you!