Hi a warm welcome to silkysteps. It's useful to ask your setting or placement what strategies they have for transitions, you may even find a designated person that's responsible for managing this. Also ask if there's a role description for the key person/worker position.
Consider how children begin at the setting - are home visits made, one off visits to the setting? Do parents stay at the setting for any length of time? are personal toys and comforters welcome in the setting?
How are children supported for the times they'll change rooms, leave the setting to start school?
There is good reading on
pages 62+ and 270 of the workbased level 3 handbook
Hope this helps a little
Best wishes