what are good jobs for people with limited skills and social anxiety?

[C]

The mere fact that you have limited skills does not mean you're limited to those skills. You can learn more. Of course social anxiety it's an impediment but that isn't a fixed thing either.Since your brain is plastic it means it can always improve.
In order to defeat the fear of social situations you need to face them. You have to learn to feel the fear and do it anyway. You may ask how you can actually do that. Well you get yourself involved in a social situation and try to interact with people. You might fail several times, but if you keep trying harder every time, you will begin to observe small changes. Social anxiety can be defeated it just takes a lot of time, action and trying again and again. There is no way around it. Don't numb yourself with medication, therapy can help but in the end it goes back to facing your fear directly.
Learning about how people think and about social habits can help too.

So my answer to your question is ANY JOB.

-pick what you want to be and fight for it. make sure you are specific, do the research, make a specific plan to getting there and most importantly ACT -- there is no easy way out or any effective
medication at this time; until the scientific world doesn't fully understand the functionality of the human brain no effective medication can be created. Although the media would have us think otherwise the truth is we are only scratching the surface in understanding the human mind and brain, so you're only option is TO NOT ACCEPT YOUR CURRENT STATE AND ACT ON CHANGING IT.
-the mere fact that you don't fit the job description now only means you have to train more