Believe in yourself. If you don’t, who will? Someone has to make it, and nothing is stopping you from being the person who accomplishes your wildest dreams. Pretty much every person who has ever failed has had some sort of excuse.
Successful people have stories of their challenges that they have overcome. When you confidently feel that there is nothing you can’t learn or develop to solve the most complex of problems will be a moment of guaranteed greatness.
If you still aren’t sure how to begin, start with a promise to work towards the achievement of consistency every day.
Keep it simple and remember that success is not an entitlement. If you really want to excel, you have to get out there and earn it every day for the rest of your life.