I read a lot about health topics and I'm going to sum what I know without explaining why, I just dont have time right now. Basically supplementing D is totally overrated and can cause more problems. There are many types of D and it cant cover half of them. You have to get sunlight. Just be well hydrated and see 'raw' (no contacts, glasses) sunlight starting at dawn, get some light exercise then, get some sun on your upper body if you can. Then sunbathe mid-late morning. Get small doses throughout the day, see the sunset. Wear real blue light blockers after sunset.
As a bonus eat some oysters for the DHA that your brain needs for sun exposure.
Grounding/earthing, especially with the dirt is slightly damp is another multiplier.
We simply did not evolve to live in an artificailly lit cave, doomscrolling on a 250hz led strobe light.