Revamp & Optimize Shopify Store

I have a shopify store called RootedInScripture.Shop The store sells Christian Inspirational gift items like mugs and shirts. I am not getting any conversions. I need REDESIGN and OPTIMAZATION FOR CONVERSIONS. I especially need the MOBILE page to look professional. Presently it just looks clunky and unprofessional. I was thinking to have the homepage and one other page redesigned. Then at that point I was hoping I could just copy the second page and duplicate and add and remove products as needed as my store is still very much evolving. I'd anxious to get started so I place a higher priority and people who can get it done in a few days as opposed to waiting a week. And I need someone who has experience with this type of work. Also I have a basic plan and it does not allow me to add users so the freelancer must be fluent in the process to work though a collaborative account