Most non - native english teachers focus on how to teach the right grammar. But for me, it is more important to think like a native english speaker, so we don't end up using the literal translation when we speak. In my case, instead of translating word by word, I decided to see what kind of message that I want to communicate (in a complete sentence), then figure how a native english speaker would say it. You can embrace this technique by watching a lot of Hollywood movies with english subtitles.

Your English is practically perfect, just a word here or there that is misspelled or a comma that's out of place. I understand completely what you mean about it being irritating. I think the biggest issue with English, or really any language being taught in schools, is the things they teach. A lot of impractical things are being taught, which aren't really needed in the long run. That, and normally you aren't taught a language to have a conversation in it, but taught it to understand what's being spoken to you or read. You're doing such a great job, if you told me you were native in English I'd believe you. Just keep up the great work.

When I wrote "blockade" I mean about this feeling: "Oh my God, what if I'll say sth wrong or incorrectly?" and then I just can't say anything because I simply scared ;p I don't know how to say it in English in one world.

Blockade? You mean a brain cloud, inability to think? I'd use difficulties. English grammar isn't taught enough in schools here (Malaysia) and it has become more of an intuition to know what right and wrong.