Serious If you could change an Thing in your life, what would it be?

I would actually learn to be useful.
I was awarded with a scholarship early on in my life, and I wasted that away.
After that I've got the chance to study in a college that I wanted, and yet again, I wasted my time doing nothing while spending all my parents' savings.
I am a privileged garbage person that always thinks what if, and never actually take action, and I would love to change that.

I am 25 now, and I have not been able to be a good impact to anyone in my life. Meanwhile people I know are moving up in life.
All I can do is just waste my time looking for stupid stuffs on the internet.