I am convinced that there is no simple formula or technique that would immediately allow you to master the ability to be guided by the voice of the Spirit. Our Father expects you to learn how to obtain that divine help by exercising faith in Him and His Holy Son, Jesus Christ. Were you to receive inspired guidance just for the asking, you would become weak and ever more dependent on them. They know that essential personal growth will come as you struggle to learn how to be led by the Spirit.
When we seek inspiration to help make decisions, the Lord gives gentle promptings. These require us to think, to exercise faith, to work, to struggle at times and to act. Seldom does the whole answer to a decisively important matter or complex problem come all at once. More often, it comes a piece at a time, without the end in sight.