If you have a specific library or platform requirement then this advice is obviously not applicable, but for learning programming and software engineering principles, I honestly can't think of a better introductory language than Go.

I love Python, and the ecosystem is vast, you're right, but it has a serious issue with packaging, delivery, and dependency management. I have almost a decade of software engineering under my belt, and Python environment issues give me a hard time _regularly_. For beginners, it is a major demotivating factor that can be a death sentence for learning.