waiting for an assessment

hello everyone, never posted here before but I'm in a bit of a pickle at the moment, i got accepted for a diagnosis mid last year and the waiting list is really long, is there anything i can do until it happens and also ive heard so many stories of people not getting diagnosed at the final hurdle because some of their traits dont match the criteria and im worried that will happen to me any advice on that?

thank you for reading and sorry its written a bit weird im just not sure how to say it right lol anyways thanks again!