Let me give you my method, it might help. Don't go head first full bore into an idea at first. Build a quick, cheap prototype with only the main features and see how your target customer responds. Gives you a ton of feedback while validating or invalidating your idea without wasting a huge amounts of time. You might find that you need to pivot your idea or target a different group. So don't waste time and money on an idea before you prove the underlying assumptions.