Can you help me with my post, please? Many thanks in advance

Good day to you!

How are things? What's the weather like? Over here, not so chilly and temperatures had risen to zero degrees Celsius.  That's why the snow had started melting and the ground began to get waterlogged. [Not possible, water freezes at 0C]
I wanted to send a letter to you yesterday but I was busy all day long.On Saturday, my friend invited me to the a free children's event. I regretted I had accepted the invitation as there were plenty of crowds were a plenty [showing you another way of expressing without changing the structure of your sentence] and I was constantly in fear of losing my daughter from my sight. We could hardly see fantastic shooting lighting away.

Yesterday, we went to three hairdressing saloonsalons [a saloon is a bar for drinking alcohol or for entertainment] and had to have our haircut because they were so busy. [You need to give a reason that you went to so many hair salons. Unless you made a spelling mistake.  If you meant "the", then you don't need the reason] hair cut. My daughter's had long hair was so long that it and she had always get  dreadknots in her hair and so it was painful every time she combs her hair. She asked me to have her hair cut and now her hair is to shoulder length. My day went well today but again I came home utterly exhausted and famished.

I have already read 20 pages of "Pride and Prejudice" and every evening I watch programs by David Attenborough every evening on the telly.

 
I hope to get good news from you.

Yours No need to be so formal to such close friends