Hi, I know Russian, and am interested in learning Serbian and Croatian. How do you pronounce these Serbian Cyrillic letters:

Ђ ђ
Ћ ћ

And can you check that I have these letters right:

Џ џ = English J sound in Jam
Њ њ = Russian нь (nj in Croatian)
Љ љ = Russian ль (lj in Croatian)
J j = Russian й (j in Croatian)