There's lots of material here from domains where I know very little. This is one of the reasons I come here! I think what you are saying is that you have anxi

There's lots of material here from domains where I know very little. This is one of the reasons I come here! I think what you are saying is that you have anxiety over things that you don't know or understand, perhaps similar to FOMO. Have you considered researching the areas of knowledge where you feel inadequate to improve your self esteem? Alternatively, you could just accept the fact that you will never know everything -- but this should not stand in the way of learning new things.