Orchastrator connectivity

their are lots of confusion in orchastrator windows. not able to clarify the environment type, robot, process and packages. Even in level 2 not clarify very well. I tried many times to create environment, robot and and process but some time it shows in robot windows and some time not. I unable to see any program into job section and some times uipath robot connected and some times not.
Please clarify each step in orchastrator and its connectivity. specially its robot,machine,process and job section and also its connectivity with uipath robot.


I have the documentation which i have created for myself , i will share that once i am off work.

I’ll be really thankful.