I am trying to bootstrap a SaaS business by myself and chose to split between SPA+rest for the product itself and static html + CSS + vanilla js for the landing

I am trying to bootstrap a SaaS business by myself and chose to split between SPA+rest for the product itself and static html + CSS + vanilla js for the landing page and documentation. I chose this because I've got limited resources and am not a designer, but with react I can get a nice polished interface quite quickly using things like material UI. I really tried hard to keep the tech as simple as possible while providing the quality I want and this was the best option.