I agree, do it for at least a month. I know most of us are perfectionist and can’t take it when we are not doing as per our expectations. Practice calling and chatting with strangers in spare time in the evening and maybe workout or do something in the morning that releases endorphins for you. Treat everyone or at least think of them as your friends so you’ll feel more safe and vulnerable. Give yourself room for lot of errors. Don’t leave until they fire you. Go with that mindset everyday.