We suggest you look at the Home Office website to ensure that you are aware of everything that you are required to know about your immigration process. Here is a link to the website you need.
Currently, you are required to do two tests for citizenship.
At our centre we run English classes that teach you English and help you prepare for this test. We can ensure that no matter which level you start at, you will reach E3 in a short while.
Check our online courses for help with preparing for the Life in the UK test.