Where should I learn about Claude Ecosystem and Agents

I've been using Claude Pro subscription for the last couple months, my usage was purely for thesis works, web development and design, my workflow was always prompting the claude code vscode extension or web interface, I've never used agents or MCPs or whatever terms that I encounter on a daily basis and I get really frustrated that other users get better results or products while I take so much time refining and prompting to get a less result that theirs, I learned about Pi Harness but I said I should at least have some knowledge about this whole ecosystem of Claude and LLMs, regarding harness, agents, skills , how to build one tailored to my use ..., but the problem is that there are thousands of YT videos that are 1hr+ teaching differenct aspects of claude along with the claude academy website , so what do you guys suggest ?