Great effort. If may suggest a topic without providing a deck, I'd say learn about the vocabulary of personal finance. Or more generally, learn the vocabulary of stuff relevant to most lifes from time to time, like medicine, law and, well, finance. This helps to search for the correct things when needed and helps communicating with the relevant professionals.
Attempting to learn medicine vocabulary without understanding the underlying knowledge base is quite hard. Taking a readymade deck of corresponding vocabulary usually leads to attempting to learn something without understanding. That leads to forgotten cards and is ineffective.
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