To increase the conversion rate of your store I will recommend you to use the upsell and cross-sell method and offer discounts, nowadays customers mostly looking for discounts and upsell offers like buy x get y and BOGO offers.
The Shopify Expert directory is full of highly qualified Shopify Experts you can look to hire and work with for any number of projects. I searched for the ones who focus on conversion rates specifically which you can find here.
Hoping you find someone to work with for your project!
Nick | Community Moderator @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog