Fortunately I don't have a problem with not making mistakes, I made a great deal of them (and many more to come) as I have been trying various online ventures for 7 years now (from youtube and freelancing to startups). And in the end some of those ended up working so well I make more than most of my school teachers do per month.
Finally, I wish I knew how not to care about what others think of me. I'm trying to find a way not to worry about it, but I'm still trying to figure it out. I think this will go away with age, as it is with most bad experiences we have in life; the cure to those experiences is to relive them again and again and realise it's not as bad as we make it up in our own heads.