is it weird to do the exercises shown on the machine?

i went to the gym by myself for the first time the other week and i did the cable machine (it was in my dorm fitness room so limited options). having no set routine i just did the exercises that are shown in the diagrams on the side of the machine. i told my buddy who goes to the gym and he laughed at it but when i asked he couldn't/didn't explain why that was funny to him.

should i not do the exercises shown on the machine? i figure as long as i'm working out it shouldn't really matter right? i'm probably overthinking this but i'm so self conscious going to the gym 😭😭 any advice appreciated