You can either be your biggest cheerleader or your worst enemy. You can do it if you stop telling yourself that you can't. You need to FLUSH away your doubts.
If you keep telling yourself that you can't do it then without a doubt you will never do it because you will never try.
Now of course there will be some things that you try that you decide you don't like doing. It's a fifty-fifty chance. But you have zero percent chance if you don't try it.
There will be times when you try something and it fails. That is part of the learning process that is necessary for you to figure out how you can do it.
What works for someone else may not work for you. But that doesn't mean that you can't figure out how you are going to do it. That is as long as you don't keep telling yourself that you CAN'T and never try.
The encouraging words that you say to yourself will give you the courage you need to try it.