Less than you think. An MVP (minimum viable product) is enough. Start with 3-5 modules that solve a specific problem. Your first customers don't want 47 bonus modules. They want results and solutions. Start delivering them, gather feedback, and grow your business.

White label means that the platform carries your brand, not that of the tool provider. You upload your logo, your domain, your brand colors, and there are no annoying hints to the platform, such as "Powered by XY" footers. This is important if you want to appear professional. It's not important if you're just testing it out.
But let's be honest: when you see your logo instead of someone else's, it feels different because it's yours.

An LMS (learning management system) is designed for structured learning. Courses, modules, progress bars, certificates—the whole "School 2.0" range, so to speak. A community platform is broader: community, content library, recurring payments, access management. However, many modern tools combine both. What you need depends on what you are selling: Education? Then you need LMS features. Access (to you, your network, your knowledge)? Then definitely the community. Or both.

Scalability means you can generate more revenue without investing more time. Example: One-on-one coaching is not scalable (1 customer = 1 hour). An online course does (1 course = 1,000 customers at the same time).
If you want to build a business that grows without you constantly spinning your wheels, you need scalable products.
Spoiler: Most successful creators and experts combine both. On the one hand, high-priced 1:1 coaching for individuals and scalable courses to reach more people.