Lets get you some insight into what CET is all about.
CET - Common Entrance Test.
This test is conducted by most states in India for getting admissions into professional courses like engineering, medical, dental and other streams.
They are conducted for people who have completed 10+2 to get into Undergraduate courses
OR
they are conducted for undergradutes to get into Post Graduate courses as well (this would be like a PG CET).
I am glad to see that you are concerned about your daughters studies at such an early stage. I appreciate your thoughts.
Well start planning well, guide her as per her likings. As she goes through her school life both you and she will be able to identify her potentials and then choose a good career path for her.
About the coaching centers, there are plenty of them. And by the time your daughter writes her CET there will be many more.
Good luck and cheers.