Enlisted here are the critical steps you would need to take for doing crypto exchanges:
Step 1- Identify the area you would be operating from.
Step 2- Go through the existing rules and regulations of that area.
Step 3- Enter into partnership with payment processers or banks.
Step 4- Establish liquidity for your exchanges.
Step 5- Ensure high level security for protecting customer data and transactions.
Step 6- Develop a strong customer support team to connect with clients/customers.