Forget your past failures and forge ahead.
You have made a lot of mistake, so what? Forget the past behind you and face the future. If you cannot do this, you will be constantly hunt down and often paralyzed by the specter of past mistakes.
What this means is that you will literally live in the past and fear of the future. There is this tendency for your to believe that because you failed once, twice or so many time before now, you are unlucky and have nothing to offer in form talents.
Ask any rich in your environment, if they care to give attention, they will agree with me that they all went through all these one time or the other lives. You have lives ahead of you, go for it.