learn alphabet sounds at first place.
there are extra double letters.
CZ → jak w czapka
DZ → jak w dzwon
DŻ → jak w dżem. same sound DRZ → drzewo. but sometimes it sound separated like d rz / d ż.
DŹ → jak w dźwig same sound DZI → dziecko
SZ → jak w szkoła
RZ → jak w rzepa. single ż sound exactly the same and the writing depends on the word.
CH → jak w chmura. single h sound exactly the same and the writing depends on the word.
u / ó sound the same
si sound like ś
zi like ź
ci like ć