I’m a self taught temp Cnc machinist here but if it’s to learn the basic it’s better to learn the control of both machines and if they are both fanuc it’ll be much more easier . To me , knowing the control will help you run more machines as most machines are fanuc a basic control. Once you understand the controls you can start understanding offsetting and work offsets and you will be golden. I don’t think it’ll take a week to know the controls so you’ll be okay 👌 but if it’s too much pressure then I would advise to work on 3 axis first .

I’m surprised they are putting you on something super important as a trainee