E-commerce Website Merge and Optimisation

i currently i have two seperate website one is on hostinger.com through there platform and one is on shopify, i would like to merge the two websites together and get rid of the shopify name as it was just a test site, not a real rgistered business and want to focus on my actual llc that is gaining traction, i want to better my website and do some seo and also continue the online sales that i was doing through shopify with my test business, the website is basically all built out, i just want somebody to help me transfer and make it one good solid cabinets website that sells doors, standard size cabinets and offer i nice tool to get estimates based of linear feet x height, wood species, and the finish or tiered grade options, i would like for customers to also be able to book estimates on my website and or service visits, kind of like bookly, i want to transfer to shopify vs the hosting platform hostinger offers because shopify has more options and apps to connect to and make the future options more seamless