Hello and what helps?

Hello, everyone, I'm in my 50s and exploring whether I should be here or not!  My eldest daughter has an ADHD diagnosis, as does my middle daughter, and then my wife and younger daughter suggested maybe it explains a lot about me ... So I have just read Ellie Middleton's book "Unmasked" and done some self-diagnosis tools and scored above the threshold on all of them!  It is so expensive to get a medical diagnosis privately and I've done the ADHD questionnaire via GP but of course there is a huge waiting list for it to be screened properly.  So if anyone reads this, I would be very interested to know what has helped you that has not cost an arm and a leg? Thanks.