Well, I was - and am still in that situation, it's slowly getting better though.
I think shyness can come from a lack of self-confidence, and lack of self-confidence from a lack of self-esteem.
So maybe you could try to work on your self-esteem ^^ (you can find useful articles here on PC, also here : https://www.therapistaid.com/therapy...lf-esteem/none).