Could you help with my writing? Many thanks in advance

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Good day to you. Nothing wrong with this, but is is not an idiomatic way to begin a personal letter/email. Perhaps 'Hello!' or 'Hi!' would be better here How are you keeping? What's the weather like? 

It's hot and a bit windy here.
Now when  that the school year has finished, I am working in at a school camp summer camp (or) summer school. We are having lots of fun with the kids. As my daughter's kindergarten is also closed too she goes comes to work with me. She likes to go there and play with the schoolkids.
During my work till 3 pm My working day ends at pm/I finish work at 3pm, then so my daughter and I come home early, eat something for dinner and then go to the playground which is not far from our hour. She has got lots of playmates. She is an introvert (do you mean extrovert here?)  like me and likes to be with others. It upsets me when some of the kids refuse to play with her, as she gets disappointed and flustered. (Not sure these are the best adjectives here. Perhaps 'upset' rather than flustered')  
As after divorce I took back my maiden surname  After my divorce I reverted to my maiden name. This means I now have to change (it on) all my documents. I have changed all of them except my Tax Certificate which I hope to do it today after work.
So what are your plans for summer? I am planning to go to Azerbaijan where I was born. It is was a former Soviet Republic, but now it's an independent country. Last week my mum left for Azerbaijan.
I wish you a great sunny warm summer  Hope you have a lovely summer!
Write back to me, please soon! (Sounds more idiomatic. Yours is not incorrect)
Nadya

Could you help with my writing? Many thanks in advance

Good day to you!
How are you? What's the weather like?
It's hot and a bit windy here.
Now that school is finished I am working at a school camp. We are having lots of fun with kids. Since my daughter's kindergarten is closed as well she goes to work with me. She likes go to the school camp and play with the school kids.
I work till 3 pm so my daughter and I come home early. We eat something for dinner and then go to the playground which is not far from our home. She has lots of playmates. She is an extrovert like me and likes to be with others but it upsets me when some kids refuse to play with her. She gets disappointed and flustered.
After my divorce I took back my maiden surname so now I have to change all my documents. I have changed all of them except the Tax Certificate. I hope to do it today after work.
So what are your plans for summer? I am planning to go to my birth place in Azerbaijan. It was a former Soviet Republic but now it's an independent country. Last week my mum left for Azerbaijan.
I wish you a great and sunny summer. 
Write back to me, please
Nadya