Those who are just drifting, can be swayed by the slightest breeze. It's different when you have a determined, specific goal. You may get blown off course occasionally, but you can quickly re-gain your direction. Nothing anyone can say will discourage you when you KNOW exactly where you're going. No obstacle can stand in your way when your goal is in sight.
Barriers disappear when passion and commitment take hold.
The things that once held you back, start to propel you forward. You have the power to do whatever you want. The trouble is, that power works against itself if it is not all aimed in the same direction. Decide what's important to you, and go for it. You've got what it takes.