Might consider trying some blue-blocking glasses (orange glasses) and cutting down artificial light at night (ALAN) as stated by

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Asleep easily just can’t sleep past about 6 hours? Maybe I don’t need more ? 

 If that’s enough for you, then that’s fine

If not, it wouldn’t hurt to limit artificial light at night, since you can try it for free 

 Also getting outside first thing in the morning to get some sunlight on your eyes can greatly benefit your circadian rhythm