Aren't they enough to understand how to distinguish between countable and uncountable abstract nouns? However I am going to provide you a few more as follows:

She has a dread of death
The children feel a horror of scary movies
Some people have a disgust against drinking
It was a fun to be with her
It was a wonder to know you cannot sing
If you are hale and hearty, it's a mercy of ALLAH
Some difficulties are sometimes a blessing in disguise
Danial had a confusion about countable and uncountable nouns

Make a list of all abstract nouns you know and use them in your own sentences by using a/an where it makes sense and get them checked by your mentor or a senior...

Regards

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Real richness is that you are so expensive that no one can buy your character.