Conversion is not improving

Do roast me as much as you like!

I’ve been trying to implement things to my website to increase sales but the conversion is 0.38% on average and I just don’t know what to do. I have bundles, I have sales, I think the products photos are good…. I don’t want to start with ads when the conversion is so bad.

I’m open for any help/tips! And if you need anymore info, do let me know.