Hello Sunair your writing is very good and you are very polite, i really think that with this good understanding you should not be afraid to speak english, believe me! It is a foreign language to begin with and not everyone can master to speak it on a native level. We only can do the best we can. I live in US more then 20 years now and still have an accent well it is not as strong as my brothers lol. So i just wish to encourage you not to worry about silly thing like that and be bold and confident and just speak. You will make mistakes and some may be embarrassing one but it is ok.