Hi a very warm welcome to the site. Is it possible your colleague is an excellent source of support? Maybe they'd have a few ideas to help you settle into your new role & responsibilities?
The planning cycle that currently happens in the 2 year old room is a most valuable resource. It will show you how the children are being observed, what their stages of development are and how their interests and developmental journeys are being recorded. From there you'll be organising experiences to help them progress, each in their very own individual way.
The daily routine and the playroom itself/environment inside and outside is also important. Think about how a typical day and week plays out. What resources are available and how is the room set up.
You will also be involved in the 2 year old progress check for any children you now have responsibility for? so it's very important you know what's needed and who you can turn to and ask for support xx
Although it links to an older EYFS this book is excellent reading -
what it means to be two
Please don't feel overwhelmed or alone. Your workplace team are there to help you, so you can help the children xx
Best wishes