There are two kinds of people in this world: those who want to get things done, and those who don't want to make mistakes.
Don't buy into the notion that mistakes can somehow be avoided. They can't be.
You are the only person who can label what you do a failure. Failure is subjective.
Failure should be our teacher, not our undertaker
Failure is not a one-time event; it's how you deal with life along the way. Until you breathe your last breath, you're still in the process, and there is still time to turn things around for the better.
Seek advice, but make sure it's from someone who has successfully handled mistakes or adversities.
Generally speaking, there are two kinds of learning: experience, which is gained from your own mistakes, and wisdom, which is learned from the mistakes of others.