To start a business in Dubai, you have to follow these steps.

First, choose an industry and the business activity you will engage in.
Next, you must identify the legal structure of your business. Take help from a consultant or lawyer in this step.
Choose a location, such as the Mainland or a Free Zone, whatever suits your business.
Apply for a legal trade name.
Finalise the paperwork.
Apply for a licence and get initial approvals.
Register your business and open a bank account.