Success attracts success and failure attracts failure because of the law of harmonious attraction.
Don't wait. The time will never be just right.
Time is wealth, and unlike money when it is gone you cannot replace it.
No alibi will save you from accepting the responsibility.
Successful people are decisive people. When opportunities come their way, they evaluate them carefully, make a decision, and take appropriate action. They know that indecision wastes time that could be spent on more productive tasks.
By all means tell the world how good you are - but do it with actions, not words.