My skills are more in algorithm development (statistical signal processing, machine learning) and electronics than web coding though, so it’s probably not as easy as just making a simple website that does something slightly useful.
I recently ran across advice here to just copy an existing successful idea and compete on e.g., price, rather than wasting time trying to come up with something novel / innovative. The argument is that if the idea is successful, then most of the market legwork has been done for you already.
I'm considering entertaining it. I last seriously did WWW-related work in 2001 or so, but Python with FastAPI + HTMX + Bulma CSS looks easy enough to spin-up on and maps pretty well to my now-ancient understanding of the web.
Copying and undercutting someone else is certainly easier!