Let's be friends

It so happens so that in my Institute (Institu for Tourism, by the way=), I only have only 2 hours of english in every 2 weeks...Yes, yes..only 2 hours.

A better way to say this would be:

'In my institute (specifically the Institute for Toruism, by the way =) ), it so happens that I only have one hour of english every week.  Yes...only one hour a week.'

Don't ask me the reason, I don't know.

'Don't ask me why, I'm unsure'. (or)  'I'm unsure of the reason'.

I think they just want to make really professional tourist managers=) That's why I need LOTS of practise!

Dear friends from all countries, lets talk about everything you want just to be beneficial to each other) 

'Dear friends, let's talk about anything you want, so we can be beneficial to each other'.

Some words about me. I'm Jane, 20 years. My native city is Moscow, Russia. I'm fond of photography, music, yoga, snowboarding and so on.
So, let's be friends)

'A few things about me.  I'm Jane and I'm 20 years old.  My native city is Moscow, Russia.  I'm fond of photography, music, yoga, snowboarding, and so on.  So, let's be friends'.

Very good job overall!