To give a professional opinion on this topic, I'll briefly revive this thread just in case anybody else is having a similar issue:
It highly depends on your use-case. Are you looking for an all-in-one solution that comes with a back-end and several modules? Then probably Squarespace and Wix are your best, widespread solutions. These come with the problem of limited scalability however. If you ever plan on scaling your problem by adding more functionality and custom-code, you are probably hitting some boundaries very soon.
If you want the best of both worlds, which would be a frontend, including CMS and customization, you would probably want to look into the likes of Wordpress, Webflow or Ghost. These support Code injection and while not the cleanest solution for own code, it does work.
The last and cleanest solution, highly scalable, maintainable, but also most expensive solution (in regard to developing cost) is a custom solution with a Frontend (can be 'quickly' put together via component kits like PrimeBlocks, TailwindUI), Headless CMS, Backend (Spring Boot, Express, or even BaaS like Firebase) and a DB (obsolete with BaaS'). This could make your application scale to the moon, but also cost the most money and time. Also, if you are not at least an intermediate programmer, you shouldn't go this route.
