I think personally diet and exercise made the biggest impact. A diet that works for your body not your ideology, lots of real experimentation needed here and stop ignoring how you feel. For me getting off of carbs and doing light keto seems to be what my body wants.

Mix in some light exercise. Nothing crazy here, with all the health tracking available these days just aim for the minimums shown there. Doesn't have to be every day, just shoot for the majority of the week.

You might be shocked at how improving these two makes a difference. Do not take these to extremes, just aim for a better baseline than what you are doing now.

Also I'm speaking as an american here, and I was especially bad in these two areas. YMMV.