DuckDuckGo, Wikipedia, Quora. Those three sites usually solve most of my questions. Sometimes I also need StackExchange. But more often than not I use Wikipedia for a quick check and most importantly the links referenced at the bottom. When I look on Quora, I mostly tend to look for answers by founders or industry experts.
PS: I recommend that you use a grammar checker, like the free Grammarly version, when posting questions.