Successful people have a special relationship with obstacles: they push through them.
Unlike people who are just pushy, angry, or demanding, the truly successful people maintain a quiet insistence. (They may also be pushy, angry, demanding or they may not be.) They cultivate an unreasonable knowledge that they will overcome this and all obstacles.
You can tell the difference between the truly successful and the merely pushy. Obstacles multiply for the pushy. They melt away for the successful.
In your corner,
PS: Can I become quietly confident of my success? You bet. Practice writing ladders. Write your current state on the bottom of the ladder and being quietly confident on the top.