I don't understand the difference between Siin and Saad, Daal and Daad, etc . I cannot hear the difference. Please pronounce these syllables slowly and carefully. If these don't exist with long vowels, use short ones.
سا صا سي صي سُ صُ
دا ضا دي ضي دُ ضُ
تا طا تي طي تُ طُ
زا ظا زي ظي ُز ظُ
ها حا هي حي هُ حُ
For the fourth row, I used dhal instead of zayn because dha' is the emphatic form of the former rather than the latter.