Follow the congregation on EWTN They follow very closely To the rubrics They follow what is supposed to be done
This gives the Order of the Mass for England and Wales: https://universalis.com/static/mass/orderofmass.htm It's dated 2011 but I don't think there have been any major changes since then. It's possible that there are some variations in different countries. You should be able to figure out any variations by comparing the document with what you see on EWTN.