Ask HN: How to learn software development concepts crucial for senior roles?

Hi HN, I'm working at an early stage startup, and want to learn about concepts and patterns that are crucial for senior roles, like: - Batch Processing - Messaging Queues - Microservices - Design Patterns - Which techniques to apply while working on a task - Properly debugging

Is there any online resource or somewhere I can see this in practice? Or any newsletter, youtube channel that discusses this in detail?

My go to sources are open source repositories where I try to understand the code bases and some PRs. But I feel overwhelmed with the resources.