So good to be able to link up with other insoms. Not that I'm happy you're struggling too, of course, but I'm sure you understand my meaning.
Anyway, I find circulating small bits of 'helper tablets' throughout the week does make a difference for me- , eg, about a half a Piriton, a third or quarter of a Kirkland Sleep Aid (those are very strong & I get them from the US), a third of a Nurofen Plus and sometimes just a paracetamol. This way my body doesn't get too used to any one drug and I keep the amounts each night as low as poss. The amounts may well need to go up as I get older however....I'm 55.
I also ensure my bedroom remains dark - particularly important in spring and summer - with use of blackout blinds and thick scarves all around the edges!
As to screens, computer goggles that black out much of the harmful white / blue are very handy in last two hours or so before bedtime, or whenever.
My OH has struggled with Restless Legs Syndrome for many years but now it keeps him awake when he wakes to go to the loo. He's 69. We have sleep apart for years because although the RLS and accompanying kicking, and banging of arms on the mattress, in his sleep didn't wake HIM up in those earlier years, it was a lost cause for me.
I would love for him to be able to sleep better nowadays, but very hard to find a cure-all for RLS symptoms. He knows he's not alone, which is something!