You're amazing.

this line, "Although neither I am an English professional teacher nor I have a certificate that proves my expertise, I have managed to teach for around Two years in an English professional school. "

should read:

Although I am neither a professional English teacher, nor I have a certificate that proves my expertise, I have taught for two years in an English professional school.

Writing that, please remember I'm not any kind of professional! It is, however, better to the English ear.

and that's all i've got! can't wait for the next one!!