Let us assume you are asking this question in regards to compliance in the financial services industry.

The answer is simple, you get external help.

You can either go to an external company that specializes in establishing/developing compliance programs for startups, or you hire people with proven experience in the field.

Some would even work out a part-time arrangement with an external consultant to act (in a part-time capacity), as a Compliance Manager, and develop the processes, systems, manuals, etc.