Where is a stable place for a beginner to start in e-commerce?

The pitfall I fell into as an e-commerce beginner was chasing tools and courses too early; I bought a bunch of software before the store was even running properly. Later, I chose one channel and one product category, and for thirty days, I only focused on four things: listing, traffic, conversion, and after-sales service. Only talk about optimization once you can make sales; if it doesn't sell…