Azure DevOps Stages, Jobs & Steps

Hello, thank you for this video!
I am working on different projects and I have a self-hosted agent and I want to run the pipelines on the same agent for the different projects. I couldn't make this happen because when I run a pipeline from a project P2 the already running pipeline of the project P1 will stop and start the pipeline of project P2.
Can you help me to make the pipelines of multiple projects be treated with the same self-hosted Microsoft Azure Agent in parallel?

Thanks for making this video. Until now, I didn't understand the difference between stages, jobs, and tasks. Now I do!

Hi sir , could you please let me know how to edit the existing tasks in build pipeline (yaml based one) and how to update variable of the yaml task