Constructive criticism please

Hi, so a little over a week ago I launched my shopify store and in my eyes it looks great butter conversions are telling me otherwise, I’ve spent around £90 in the past 5 days gaining 1.7k store sessions but only 1 conversion, a grand total of £16 ! Something is clearly wrong and I’d like someone else’s opinion looking at it from a different angle, any constructive criticism will help a lot thanks in advance, the website is My Shop