Proszę o sprawdzenie:)

Dear Mrs Dickens
I am writing to you because I would like to get a flat in exchange for care of two children. I am responsible student. When I was in the USA, I looked after children for( czy for oznacza przez) two years. They are very nice and they do not cause any troubles. I am experienced person and I think that you will be satisfied with me( Chciałam napisać Myślę że będziecie zadowoleni ze mnie).In England, I am going to learn in language school and I also will prepare on language competition too. I will have about five hours ( chcę napisać że będę miała około 5 godzin żeby zająć się dziećmi) to look after children. Certainly, I will answer on the next questions(chciałam napisać że odpowiem na dalsze pytania) and I hope that I will get a positive opinion.

Przy okazji jak będzie po ang.
Zapraszam was na szklankę herbaty
Proszę Cię o wypożyczenie mi książki z biblioteki szkoły językowej.
Będę bardzo wdzięczna=)

I am writing to you because I would like to get a flat in exchange for
TAKING care of (tutaj wypada czyje to dzieci YOUR?)two children.I am A responsible student. When I was in the USA, I looked after children for (to jest ok) two years. They 'are' WERE (czas przeszly) very nice and they 'do' DID not cause any 'troubles' TROUBLE. I am ANexperienced person and I think that you will be satisfied with me. (ok)
In England, I am going to learn WENGLISH in A language school and I 'also will' (WILL ALSO BE preparING 'on' FOR A language competition too. I will have about five FREE hours to look after THE children.
Certainly, I will (BE ONLY TOO HAPPY TO) answer 'on the next' ANY FURTHER questions and I hope that I will get a positive 'opinion' response.