Jojojo
Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is
Welcome to Benefits and Work Ideally, you want them to explain the problems that you would have with completing the ESA activities, failing that your conditions and how they believe that they affect you.
Re a statement from a relative; It can be in the form of a letter, so their name and address, how they know you and how often they see you, a description of your problems with completing the ESA activities, and lastly a statement attesting that the contents of the letter are accurate to the best of their ability and of course a signature.
Gordon