My advice is once you have an idea just start it. The best way to find out if there is a market is to sell it. Come up with a product or consulting idea, ask people you know to buy it. It's easy to get stuck in the researching, printing business cards stage, the best way to start is to do it, the best way to become credible is to do it. As you go along you can google things like product pricing/ consulting rates, business plans, websites, accounting software, etc.
Also having confidence in yourself and idea is important.