The buddihst and meditation community is very aware that chasing bliss is not the goal. Jhanas are a tool. A good teacher would advice you to develop enough concentration and use that for insight meditation (vipassana). Mindfulness based stress reduction MBSR has good scientific support, and further studies and meta studies confirm this more often than not.
From personal experience I agree 6 weeks are far too short for any meaningful long teem change, but meditating over the past two years, 45 min daily, had a noticeable impact in my case and there are similar reports all over the internet.
That’s much longer than my practice, so it makes me wonder if the less impressive results of meditation are caused by people like me that do 5–15 minutes.
I’ve deep trauma that psychotherapy helped, but I can’t say meditation does anything for me besides calming me down for the next hour or two.
Maybe you try a three day meditation retreat and see if you can benefit from going much deeper.
I'm nowhere qualified to give an objective answer, but for me, doing a 15 min meditation feels more comparable to a power nap. I feel refreshed, but I won't gain insights about myself.
From personal experience I agree 6 weeks are far too short for any meaningful long teem change, but meditating over the past two years, 45 min daily, had a noticeable impact in my case and there are similar reports all over the internet.