here are my notes as someone who studied this stuff extensively for my book launch (just crossed $200k revenue) https://github.com/sw-yx/brain/blob/906dbc6fd6d22fa69968ebc6...
in generally for OP's stuff i would disagree on launching on product hunt first. PH is a giant pyramid scheme where people just compete for the #1 badge each day. what the most successful products do is launch everywhere else first, and then after a few months email their happy customers to support them on PH. this is why you are #20 because you didnt study the game