Dead in the water
....
answer the call of nature
....
beat around the bush | beat about the bush
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When it rains, it pours
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can't see the wood for the trees
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A storm in the brewing / a storm is brewing
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The sky’s the limit
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A breath of fresh air
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a drop in the ocean
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(looking for / seeking) greener pastures
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down to earth
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go with the flow
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The calm before the storm
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a ray of sunshine
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a voice (crying) in the wilderness
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at sea | all at sea
....
can't see the forest for the trees
....