I know you've mentioned having a fitbit. Years ago I had a hand me down and it gave me insight into my sleep that was invaluable. Fast forward, got back into running for the fifth or so time in my life - a few Garmin watches later, and made a conscious choice post covid to stop making myself miserable through alcohol. I still enjoy a drink here and there but it is absolutely stunning how bad one or two drinks will screw up your sleep - and at that point it is a good night but the entire next day is garbage. Short version of this was meant to say - get good sleep tracking and it may open your eyes a bit and help you focus on your goals. I go to bed much earlier than I used to (9pm feels late now) and target 8 hours of quality sleep - especially on nights before runs, which now is every two days unless I have an event - like a concert or something - that wipes me out.