Grammar or fluency?

Sometimes I think of my English and I know that it is not perfect at all. I am not very confident, especially as far as the grammar is concerned. When I was younger, I had studied this language at school. We combined our mother Czech with English, it was a lot of grammar, theory, exercises. Yes, I understood them, but only that particular hour, next was another grammar rule and it was the same. Gradually I realized that I have a big mess in my head. An it has not changed to this day :-) Maybe, fortunately for me, I started few years ago looking at English from a little different perspective and maybe because of it I was able to continue to learn and actually I love this language today. What happen? I realized that all of that is nonsense. I realized that I do not need all this knowledge ABOUT the language, I need USE this language, understand it, be able to speak and write... NO grammar rules too much needed. I realized that when I was a little boy I did not learn any grammar too. Yes, at school it started and actually it does not helped me to be more FLUENT in my mother tongue – Czech. Maybe to the contrary :-( While speaking I do not have time to think about any grammar rules, I need to focus my attention to the topic I am saying, to the message I am delivering and to my partner in communication. I found that it is better to make mistakes, but to be fluent and natural than NOT TO BE ABLE to communicate at all. By the way, most of the time I speak with not-native speakers and they “do not now” too, and if with native ones – they are tolerant :-) So, I follow the rule: "Always Do Your Best" what is, I think, the 4-th agreement by Migual Ruiz. Hopefully the right grammar will come later too! With my Czech it was the case after all. What about you?