What is the agent setup that I should try? What I tried is indeed "set up Cursor" or "copy-paste ChatGPT", and it was all bad, I have no idea what is this "age

What is the agent setup that I should try? What I tried is indeed "set up Cursor" or "copy-paste ChatGPT", and it was all bad, I have no idea what is this "agent" and "MCP" stupp.