Very few people have a problem with so-called dumb questions, especially from someone who genuinely wants to learn. They take issue with low-effort, unresearched questions, and those from people with no interest in the subject, who just want someone else to do their research (or homework) for them.
There's no need to know where you should start before asking a question.
Continuing to expect spoon feeding quickly gets tiresome, but deciding just based on a sentence or two that a question is low effort or not is usually not the way to go.
True. If they can discern a newbie question from a idle do-my-homework for me question, people tend to be very good. I grant there are some exceptions, but few (though irritating).