Your inner voice that tells you that you can accomplish something is a positive and healthy one. The more you listen to it and trust it, the more likely you will be successful at whatever you're attempting to do.
Intuition offers a direct line to your life force, and also, as I experience it, to a divine intelligence. We can't afford to remain deaf to intuition's messages. Its expertise is energy; its job is to know every nuance of what makes you tick.
Guidance comes through when you're willing to let go of your attachment to "the answer" and willing to live in the question of what it is you want to create. You must be willing to release your expectations of life. There is no "trying" in receiving guidance. It is an act of surrender.