Purely from a blogging perspective, there is no question WP has the better CMS and overall controls/backend for non-programmers. Shopify is recommended more for expanding your ecommerce options with plugins, promo offers etc. Obviously would need more context here as far as feature scope and what your site needs were, but I'd lean more towards WP just based on what you've described. there are a checklist of factors you can go through in order to figure out which open source platform would be most advisable. Happy to connect and offer any insights or guidance I can to get you on the right platform.