I am glad I have always been extrovert and I never cared if I would be laughed at or not, actually I'd be more open to native speakers than non-native speakers that master the language. But no one is the same and you have this little situation. Like it was said above, look for a tutor or even a language patner in order to help you. What other ways can you think of? Find a serious tutor or a serious partner and bring the rules to the table, tell him or her exatcly what you are looking for. Also, I am pro-grammar, doing grammar exercises will help you heaps, there are fun and interactive exercises out there, awesome textbooks that will help you a lot. If you're interested, I can send you heaps of files like these, just send me a message and I'll be glad to send them to you! :)