list, żywienie

Proszę o sprawdzenie i poprawę.
Zadanie:
Postanowiłaś wypróbować dietę, którą ci ostatnio polecono. Napisz list do kolegi z Danii:
-Poinformuj go, jaka to dieta i jak się o niej dowiedziałaś
-Opisz, na czym polega ta dieta i podaj, jak długo już ją stosujesz
-Opisz problem, jaki miałaś pierwszego dnia stosowania diety i jak udało ci się go przezwyciężyć
-Napisz, co podoba ci się w tej diecie i zaproponuj koledze, aby też ją wypróbował


Dear John,
Sorry, I haven’t written for so long, but I was busy. Guess what? I am on a diet. It’s a low-fat diet. I read in a newspaper about this diet.
I must avoid fizzy drinks and e-numbers. I eat products rich in protein. I have to use this diet for about 3 weeks and it's great, because I lost 5 kilograms!
But at the beginning I have some problems... You know, that I love sweets, aren't you? In every moment I wanted to eat something sweet. It was hard for me. I couldn't exist without sweets! But I thought that if I want to lose weight I have to keep on this diet. Few days later this diet became normal for me and I ate only this products, which is good for my health.
I like this diet, because I can eat things, that I like and I wouldn't spend so much time in the kitchen. You should try it on your own! It is the best diet in the whole world!
Well, that’s all for now
Best wishes
XYZ

I am on a (napisz to 'low-fat' diet. 'It’s a low-fat diet' (niepotr), (napisz tu...which I read about in a newspaper). 'I read in a newspaper about this diet' (niepotr).
I have to use this diet for about 3 weeks and it's great, because I (daj tu 'already') lost 5 kilograms!
But at the beginning I 'have' HAD (czas przeszly) some problems... You know, that I love sweets, 'aren't' (calkowicie zle, tutaj to twoje 'are you not' calkowicie nie pasuje, i musi byc 'don't you') 'you' (niepotr)? 'In' (niepotr) Every moment I wanted to eat something sweet.
Few days later this diet became normal for me and I ate only 'this' (to niepasuje, dlatego, ze to odnosi sie do l. poj - a tutaj masz l. mnoga - products, ale ja bym, to napisala....'the produce') 'products' (niepotr), which 'is' (tutaj ARE, dlatego, ze masz l. mn-produce, products) good for my health.
I like this diet, because I can eat things, that I like and I 'wouldn't' (tu sie pomysliles - ma byc 'don't) spend so much time in the kitchen. You should try it (daj tutaj 'yourself'). 'on your own'(niepotr)!

Dear John,
Sorry, I haven’t written for so long, but I was busy. Guess what? I am on a low-fat diet, which I read about in a newspaper.
I must avoid fizzy drinks and e-numbers. I eat products rich in protein. I have to use this diet for about 3 weeks and it's great, because I already lost 5 kilograms!
But at the beginning I had some problems... You know, that I love sweets. Every moment I wanted to eat something sweet. It was hard for me. I couldn't exist without sweets! But I thought that if I want to lose weight I have to keep on this diet. Few days later this diet became normal for me and I ate only the produce, which are good for my health.
I like this diet, because I can eat things, that I like and I don't spend so much time in the kitchen. You should try it yourself! It is the best diet in the whole world!
Well, that’s all for now
Best wishes
XYZ

???

sorry,
To ma byc : I have USED this diet......

Ja bym ujal to zdanie z czasownikiem stick.