How often do you feel confident showing your work?
Probably almost never. Showing your work is difficult. It means opening up to the judgement of others, accepting you might have done something others will not pick, transitioning control from you to the rest of the world. And so, you keep your work hidden. You continue adding to it, refining it, editing it, perfecting it. The right time, of course, will never come.
As many other things, showing your work is a muscle. It can get trained. Do it once, do it twice, do it ten times, and eventually it will become natural.
P.S.: A great question to ask when you are this kind of stuck (or any kind of stuck) is always: “what is the worst thing that could happen?“. The point being: the absolute worst thing is probably very unlikely to happen, while the worst thing that is likely to happen is often something you can easily live through. As a matter of fact, you probably have already in the past. Keep yourself anchored.