I used to be afraid of making mistakes and embarrassing myself while speaking in Polish but now I don’t care.
This is a common problem among language learners. The fear of making a mistake inhibits them from moving forward. In fact this is true about more than just languages. Being scared of failure is an excuse not to try.
I like to think of the downside. What’s the worst that can happen? In the case of foreign language learning there is your perception of frustration, maybe you have to change topics, and sometimes the mistake can even be funny.