Hello Lucia, 

This is a good example of FCE level writing, and I've made some corrections to help you some more.

FCE. Writing

I would be very glad if someone could correct my essay and also if he/she want to could recommend me a better way to sounds natural.

Hi Jo,

It That sounds really good. I live in a vibrant city near Berlin which is it's a perfect place to come and make a short film.
Close to my house, there are high mountains where people are go climbing and practise extreme activities sports. It is awesome how they are risking their lives. Another interesting place that you can to film is the botanic garden. Its quite far to from my house but it's really worth it. It's wonderful and pretty colorful in April with a wide range of different flowers.
In addition, my friend Mika could help us. She was brought up by their her grandparents so she knows all the important events that the city has suffered.
By the way, I wont be available in September because I've received a grant to do my internship in India, but I'll introduced Mika and she'll go everywhere with you everywhere.

Best wishes

lucia

FCE. Writing

I would be very glad if someone could correct my essay and also if he/she want to recommend me a better way to sounds natural.

Hi Jo,

It sounds really good. I live in a vibrant city near Berlin. It's a perfect place to come and make a short film.
Close to my house, there are high mountains where people are go climbing and practising extreme activities. It is awesome how they are risking their lifes lives. Another interesting place that you can film is the botanic garden. It's quite far to from my house but it is really worth it. It's wonderful and pretty colorful in April with a wide range of different flowers.
In addition my friend Mika could help us. She was brought up by their her grandparents so she knows the important events that city has suffered.
By the way, I won't be available in September because I've received a grant to do my intership in India, but I'll introduced Mika and she'll go with you everywhere.

Best wishes

lucia