What makes you think you're so special?
When we're faced with a challenging situation, particularly at work, it's really easy to focus on our failings and our lacks. We start comparing ourselves with others and imagine how they would handle it so much better than us. That because they don't have our handicaps and character flaws, they manage someone better, get that promotion, deliver that project more efficiently. Before we know it, we've scripted a whole movie in our heads where everyone else is in the spotlight of success. Whilst we've cast ourself in the role of the long suffering, weak, put upon character who occasionally scuttles out from a corner and doffs their cap to a generous benefactor. (I've been watching quite a lot of period dramas recently, apologies.)
But what makes you think you're so special? Do you honestly think your perceived failings are any greater than anyone else's? Of course not. But they seem that way if you're constantly focusing on what you can't do, rather than what you can.
Don't turn up to a situation, cap in hand, feeling like you're not enough. You are. Yes, there might be stuff you don't know, yes there will be things you could have done better and that's the same for all of us. We do the best we can. And if you show up offering what you do have, that's what makes you special and that's what will make the difference.