lettera di prova ipotetica gita scolastica, è corretta????Is it correct ?

Dear Nicole,
How are you? I am fine. ?? this is to short and should not be used here. You would want to make a longer sentence for example: I am doing well and wanted to write to you.
I am a primary school teacher in Venice and I like my job.
The school year was started on September 15th.
On the 31st of October at school we celebrated with a Halloween party at school and we have sung.
Thank you for your invitation. I booked the ticket for 10 th December 10th. I am will be coming from Venice at 9 o‘clock a.m. and I am the first time to gone to This will be my first time visiting London.
When I will be to London there I would like to visit the your school and also the London brige.
See you soon,
Kati