1) If you're talking about an electronic clock, the pause button is usually in the middle of the clock. But some clocks are different so if you're ever unfamiliar with how a clock works, you should ask how to use it before the round starts.
2) I think that you did the right thing by not turning the rook upside down. Depending on the tournament rules, it may not be allowed. There was once a controversial game between GM Bator Sambuev and IM Nikolay Noritsyn where Noritsyn promoted to a queen by flipping the rook but was told that the piece counts as a rook and not a queen. https://www.chess.com/news/view/controversial-finish-to-canadian-chess-championship-5047
So last week there was tournament at my city, i decided to participate.So everything was going smoothly until i wanted to make a second queen.On the normal rules if there are not any spare queens u can turn ur rook uspide down, or pause the clock and ask a judge.The thing is i didnt want to flip rook but i didnt want to stop the timer becuase didnt know how! judge was close so i started shouting like an idiot "HEY JUDGE, JUDGE!!" while my timer was running.So he came and i explained it btw with my clock being on minute on 1:20min. He was also in panic and hurry so he just said that i can flip the rook.I endedup winning with 18seconds on my clock.At the end that dosent matter i just wanna know two things:
1) How do you stop chess timer?(Maybe a video explanination)
2) Do you think i should have done somenthing else?