You can absolutely do that. If you want to upgrade to a paid plan to get some of the features you want, then you can switch at any time through the My Products option in your account or with the help of a GoDaddy Guide. Once you upgrade your site will have all the same customizations and work that you've already put in place, just with the added features. See Website Builder plans and pricing for more info.
Starting with Wix's ADI (artificial design intelligence) tool, some of the site builders now offer a tool that lets you enter social accounts and other personal or business info, and presto bingo, they get you a no-work website. Jimdo and Simvoly now offer similar if somewhat less ambitious tools. Wix's ADI even impressed a professional designer acquaintance of ours with results we saw in testing, mostly using images and information it scraped from her LinkedIn account. Best Website Builders 2020