Popular CMS for website migration

I'd like to migrate my online store to one of the popular e-commerce CMS What can you recommend? Also, I want to keep the look of the product page https://schuette.shop/schuette-plissee-mit-bohren-nach-mas-suprafix-halterungen-mit-bohren-premium-kollektion-white-p112 because I fear that may drop conversions I think Shopify is too expensive for me, please don't suggest it Thank you in advance