I think avoidance is the worst thing for anxiety in the long run. I feel like maybe start off very small and after a while you will become desensitised to the situation, and then you can work your way up. Also, I think what can help is thinking about other people. For example, have you ever had a social interaction where the OTHER PERSON messed up? Most likely you wouldn't even notice because you were too focused on yourself, saying the right thing etc. Even if you did notice, did you think about it for long afterwards? Most likely not. Now apply that situation to yourself, most likely it feels worse to you than it actually is. Not sure if this was good advice but I hope it can help a little.