The main difference is how well we understand things. If we learn skills by ourselves, we get basic ideas from books or online. But if someone is there to show us exactly what to do, we understand much better. For example, we can watch a cooking video online, but it might not turn out perfect. However, if someone is there to guide us, it's harder to make mistakes.

I believe the key difference is motivation. It's possible to learn skills alone, but it's more motivating and fun to learn from someone else. It's interactive, and easier because we can ask questions. When learning alone, we only have the internet to ask, and it can be slow to find answers.