Lots of add to cart but no sales

I launched my store 4 days ago https://headphoria.com and I got 51 add to carts, 41 people reached checkout but only 3 conversions.I’m not sure what am I doing wrong here. Please help!

I’m using TikTok ads to get traffic and I’m targeting the US and Canada. Should I add more things to the home page or the landing page?