Updated: Apr 29
Bitesize have produced this page all about transferring to secondary school. I don't know whether we will be back at Johanna before you go on to your secondary schools but there are definitely some things that you could do to start getting yourself ready.
Have a look here and find out the advice they have over at Bitesize.
Also, try having a good look around the website of your secondary school - you should find some useful information there.
At some point, I'm sure that we will hear from your schools but until then, don't let it be something you worry about but do some research where you can.