Noto Nastaliq Urdu font spacing

I’m preparing an NT using the Noto Nastaliq Urdu font. I’m having difficulty getting the spacing between letters to not be too wide and the spacing between words to not be too narrow. I’ve tried various combinations of Letter and Word spacing adjustments on the Font tab, but I haven’t found a satisfactory solution. Currently the output looks like a string of characters without any discernible word separation. Suggestions?

Follow up: unchecking Letter Spacing Adjustment and tweaking the word spacing adjustment did the trick.