Help desperate to help my son with full spectrum cbd am lost as to which places that autism qualify to get it medicaly

Hi I have heard about cbd but it is not that straight forward as although it's available and legal without the THC present in a lot of countrys includeing the UK you can not get the full spectrum cbd oil here as it is ilegal due to the THC . However I know that I think colorado in the states and a few others i suspect you can get this full spectrum one as they qualify autism as a medical condition to get it. Reason I say this is becuase  even the places where you can get it medicaly legally etc with the THC in it you will not always still be able to get it because they will only give it for cancer patient or MS and not autism. My son was diagnosed far too late at 18 had no help and was just told to take prozac which did not work ie basicaly the drugs don't work he told me and he wants to try natural things. He basicaly does not leave the house etc and is very depressed at the thought of that being his life for the next whatever yrs. He had confided in me about 4 wk ago he was going to take his life and that  in end did not due to he said he had heard me say when i was down in the dumps when the pandemic was at it's worst that although i felt depressed i wouldn't harm myself as I want to be around for him..so he said this is why he did not take his life as he said he should be around for me as he knew my world would be over without him in it. He has since got a bit of a birghter mood and says he will be honest and tell me next down he gets down like this and it has been a wake up call for me in that i have had to take a long hard look at his behaviour and be able to know and see the different things that he does that are warning sign he is getting down again. 

So this is why I am desperate in asking can someone please help me and tell me where are the places country or where can i find out who do i contact to find out the more nuanced details of whihc places he will be able to get the full spectrum stuff and qualify to get it as prescription as there are lots of places that do the cbd but that is not realy the point. Plus I have no idea how i would even make this happen for him ie am uk citizen over 50 and single but am feeling that desperate to help him that I would like to know this info as it is a ray of hope..and maybe the other road blocks I can put every fibre of my being into making it happen? who knows.Thanks for any help