Is this a new business? If not, how much have you processed before and what is your chargeback ratio?
You could start with a crypto payment gateway for your business, it's the fastest to get you started. Your business will fall under high risk business, means, most payment processors will refuse to accept your business.
You may already have tried to apply for a merchant account with some processors to find out that they don't want to board you. Some people swear to Instabill and AdvCash for payment processing, it would be a good start.