Ask HN: Improve my technical expertise in AI

I’m looking to deepen my understanding of AI—specifically agentic software development, including building agents and their tools. I already have some hands-on experience and have built a few basic agents, but I’d like to strengthen my expertise.

Could anyone recommend high-quality blogs, videos, courses, or other resources worth reading or watching?

This is mainly in preparation for an upcoming interview, and I want to make sure I’m well covered on the topic