Optimize Shopify Mobile Checkout Flow

Job ID: 39887987

Budget: £250 – £750 GBP

I want to increase conversion rates on Shopify by showing an easy Add To Cart button on the home page and every product (it's currently just a + on the image) https://zebraprintevents.co.uk/collections/mini-bundles and i want on the actual product page there to be a sticky add to cart button.

Any further advice to improve the mobile process would be appreciated. Currently get 2.23% conversion, trying to get 3%+