Could you help to correct some sentences, please?!

[Chloe]

Hello all!

I would be very thankful if you could correct the following sentences.

"I’ve just seen some pictures of you and your friends and I thought I had to write you. I often write email in my head, but I seldom do it on the paper. Do you know it? Or is it only my feature?...... I wish I could spend my summer holidays in K. learning L. at BBP. But I’m going to S. I’m doing my internship at Rainbow Ltd. Have you ever heard about this company? It's a German company that produced plastic toy figures. It’s headquarted in Germany, but has manufacturing sites in different countries including S. I’m going to live with a family that has 6 children! I’m the only child and I can hardly imagine the life in such a family. I look forward to getting this experience!... I remember you were working there. How long did you stay there? Did you attend the language course?... I’ve been learning P. for months, but I notice that it isn’t easy to keep all foreign languages in my mind...."

Thank you a lot!
Best wishes,
Chloe

[Delfino]

Hello all!

I would be very grateful if you could correct the following sentences.

"I’ve just seen some pictures of you and your friends and I thought I had to write you.
I often start to write an email in my head, but I seldom take the time to actually write one
on paper. Do you know something like this or am I the only one doing it? ...
I wish I could spend my summer holidays in K. learning L. at BBP.
But I’m going to S. I’m doing my internship at Rainbow Ltd.
Have you ever heard about this company?
It's a German company that produces plastic toy figures. Its headquarters is in Germany,
but they have manufacturing sites in different countries including S.
I’m going to live with a family that has 6 children!
I’m an only child, so I can hardly imagine life in such a big family.
I am looking forward to this experience! I remember the time when you were working there.
How long did you stay there? Did you attend a language course there?
I’ve been learning P. for several months now, but I noticed that it isn’t easy to keep all those foreign languages in my mind..."

Thank you so much!
Best wishes,
Chloe