If you are scared to open your mouth and sound like a moron, you'll never get any practice at all.
Learning a second language is a lesson in humility. Trying going to a spanish cafe and asking for a 'bocadillo de polla' (instead of the correct 'bocadillo de pollo') ... that 'a' at the end is the difference between a 'dick sandwich' and what you most likely really wanted, a 'chicken sandwich'.
Had to learn that one the hard way myself. I'm sure the waiter in Sevilla is still laughing.
