Father Victor has preached about the upcoming new Missal, with its new translations and different responses from people who are worshipping.
There are many resources to prepare you for the changes, but here are two to get started to understand the revised liturgy. It will be implemented the first Sunday in Advent.
And this is a side-by-side comparison of the changes to the prayers and words we will say in December.
Please take some time reviewing the new words. Perhaps it would be helpful to print this guide to become familiar with the new prayers.