The simple answer is, don’t care what others think about you. Of course, it looks harder than it sounds. But if you think deeply about it, do everyone’s opinions matter? For the most part, it should be no. Another reason why you may be scared or shy is because you are scared to fail. Failure is a common thing and can be a good thing if you learn from it. You shouldn’t be afraid of doing something as you will never know why will happen.
You have to develop the perfect mindset, your mindset is what is fooling you. This is why maintaining a healthy mental stability is important.
I’m not really good at this stuff but I hope my advice helped in some way.