come out of your shell
US /kʌm aʊt əv jʊər ʃɛl/
UK /kʌm aʊt əv jʊər ʃɛl/

1.
to become less shy and more sociable
:
•
After a few weeks at college, she really started to come out of her shell.
•
It took him a while to come out of his shell and make new friends.