My wife was watching a sewing/quilting show on TV the other day and I overheard one of the ladies say, "No, I'm not that talented. I've just made more mistakes than most people and I've finally figured out how to do it." Actually that's paraphrased, but it's point is accurate.
I feel that way about guitar. Although many others think I'm talented, I prefer to think of myself as experienced. I don't think you can do something wrong on the guitar that I haven't already done. I hate to brag, but I believe I may have done just about everything wrong at one time or another. As a (mostly) self-taught musician I play as well as I do because of stubbornness and determination applied over a long period of time. I've often said that I'm living proof that you don't need lessons to learn to play well if you don't mind spending twenty years to do four years worth of work.
There are many who play better than I do, but that doesn't really matter. My experience in screwing things up is a bonus in the teaching studio or classroom. I understand why my students want to do certain things incorrectly and can generally catch them before they develop bad habits. "I've already made these mistakes so you don't have to. Go and make some new mistakes" I tell them.
Mistakes are an integral part of learning. But they are frustrating and can make us feel bad about ourselves. Children typically are used to being guided through their mistakes and adults are intimidated by them. I've often wondered if that's why kids tend to learn faster than adults. Kids don't care if they play a bad note. They just fix it and move on. Adults worry about how they appear and believe that it should be right the first time every time. Oh they know intellectually that it doesn't work that way, but it doesn't prevent them from committing emotional battery on themselves.
I can't talk too loud, though. When I'm away from music I'm just as bad. I don't do well with mechanical things. I can't think through the problems or execute solutions when I do. In musical terms "I ain't got the chops". I get frustrated to the point of temper tantrums. It's embarrassing that I've never learned to control it, but now I just get someone else to do these things and I practice my guitar. Effective time management is my justification.
Whenever we see someone doing their job very well we should take time to appreciate the number of times they screwed up to finally get it right. And, my own history not withstanding, learn to grow from our own mistakes. So go ahead and tackle that project and don't be afraid to totally screw it up. Unless it's heart surgery, or atomic weapon technician, or air traffic controller. ("Wow! Three planes at once. I'd better not do that again.")