Start marketing your business: You should think about marketing even before you have a finished product or service because your revenue depends on it. Create teasers, take pre-orders or build a hype for your new product. Build a marketing strategy with social media, email, SEO, word of mouth and advertising.
Build a website for your online business: Hire good web designers, developers and digital agencies to build your website. You need to invest money in this as your business is fully online. Focus on UX design, user interface, and the overall customer experience.
Test and launch: Do extensive testing before you launch your website. Use UX tools, Google Analytics and other website tools to test loading times, server load and user flow on different devices such as tablet, laptop and mobile.