IS THE PRODUCT PMF ? "I WILL NOT PROMOTE"

Hi, I am a solopreneur from India. I have been tracking my app for the last 17 days, and it has been 30 days since its launch. The app is focused on productivity and allows students to establish social connections. I would like to share some analytics related to its performance and discuss whether the product has achieved product-market fit (PMF). I'm open to feedback in the comments but kindly ask that we keep the discussion respectful. Thank you! Since launch have gained over 450 organic downloads, Without advertising ( 291 installed audience and rest have uninstalled ( I believe that the reason mostly for uninstalling is that the app has lot of bugs to still fix and is still in prototyping phase), that being said our store listing conversion is around 40% average (which i believe is a really good mark, I see it as a sign that user need these product)) Now coming to the real juicy part, retention and other analytic metrics, \[ For the past 17 days \] New users are 310 , and 102 Returning Users week 0 - 100 % retention week 1 - 17.3 % retention week 2 \[ just been 2 days \] - 11% retention average engagement is around 12 minutes . Now i am not sure if the retention is low because the user have no need for using my product / solution or is it because of the user experience to use my app is lacking \[ I am solo on the project so yeah, ideating, designing and building is all done by me and I have no idea to what the issue can be or am I just overestimating stuffs and should chill out a bit and focus on getting more data and talk to my users \] Let me know ur views