Hi Ania,
Nice system, I hope it will work. Many people also use flashcards for remembering vocabulary. It is possible to have electronic ones with sound now but traditional ones work as well.
Basically you put a phrase or word in Polish on a small piece of paper and on the back write English translation. You make 10 or 15 of those and then try to recall the Polish word when seeing an English translation. If you succeed (you remember the word) you put the card aside.
If you do not remember, you take the card at the end of the stack. You continue until you do not have any flashcards left. After a day or two you repeat until you remember the words well. If so you can destroy old cards and make some new ones.
I try to learn Russian like that with the difference that I use software called Anki. It is time-consuming but it seems to work.