Do you want to write? Then do it.
Quit making excuses. Quit telling yourself and the people around you the reasons why you can’t write your idea right now.
Did you have your idea a month ago? Think about the month wasted. Did you have your idea a year ago? How about more than a year? How about five years? Has your reason for not writing it been the same the entire time?
No more excuses.
Write now. Don’t waste another day.