Dear Erni,
Thanks very much for your letter. Sorry that I haven't written for so long but I was busy at work. I've so much to tell you that I don't know where to begin. Don't worry too much. I'll try to give you some advice on how to improve your English
First of all, if I were in your position I'd a join an English school in your city. According to me in Kielce there are a few good English schools. I suggest joining a `Profi Language School'. This school employs good teachers who speak English very well. You will speak o lot. Speaking is very important skill because many times you meet people who speak only English.
Another good idea is to learn English abroad, especially in England. There are lots of nice professional schools. For example, my son every summer holiday goes to Brighton to the `LTC School'. That way you practise English all the time. You'll learn English fast and comfortable. Unfortunately, it is expensive kind of study.
I have to admit that another way to improve your language is reading different kinds of English magazines and watching a film use subtitles. Your vocabulary will expend.
I hope that my advice helps. Let me know what happens. Give my best wishes to your family. I look forward to hearing from you.
Love,
Adam