Save the picture after drawing it.
Then understand the function of buttons in the menu bar of programming software.
How to choose cutting tools, how to set processing parameters,
How much speed, how much feed, etc.
It is best to simulate the tool path after completion.
See if there is any interference with the tool and if there is any problem with the program.
Finally, the simulation program is fine.
Input into the machine tool for processing.
The drawings you get need to be processed where the dimensions are marked. Generally speaking, if it is a regular company, there will be a work schedule for you. What to do first, then what to do, is decided by the technicians first, and you can do it step by step as required. You can ask them if you don't understand.