ComfyUI API

Good morning! I have been following the instructions to be able to have a comfyui workflow as an API. But I'm stuck here, having the template created "with flux.dev" and having a serverless. Questions I have, How do I use the workflow I want? How do I know the endpoints? How do I test the endpoint? I want to be able to have the freedom to create a workflow (in a normal pod or wherever) and somehow upload it to be able to make an endpoint and use it in production. If you know of any articles or videos where this is explained, I would be grateful. Thank you in advance,