Try some Melatonin first. It is a hormone that is related to sleep. Mrs SLB and I are both approaching your age, and a few months ago were having sleep problems, she could not get to sleep and I would often wake up after three or four hours and not be able to go back to sleep. She had heard about Melatonin so we tried it. Instant relief and we now both sleep like we haven't in 30 or 40 years.
It’s best not to take Melatonin long term. Just use it to get your sleep cycle sorted out and then go off it until you need it again.
Melatonin is a hormone, so you don’t want to overdo it. It can affect serotonin levels as well, which is what makes you feel awake and alert during the day.
An herb that would be safer to use in that it wouldn’t mess with your endocrine (hormonal) system is Valerian. I find it very effective.
This works to replace what the body is no longer producing. It works very for me well at the 100 - 200 mcg level. I am 71, sleeping as well as I ever did. Sometimes I also take a reduced dose enteric aspirin.
Sleep problems, as one ages, IMO, is more of a management problem than it is something that needs a drug. Go with the flow. If you are not tired get up and do something.