The sentence looks fine. Only "large amounts" can be a substitute from your list. "small" and "tiny" can be used in front of "amounts".
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Liveinjapanlarge amountsLarge amounts is fine; big amounts is grammatical but I don't think natives use it very much; many amounts is grammatical but unidiomatic - to be avoided; much amounts and a
big amounts
many amounts
much amounts
a little amounts
a few amounts
Thanks
LiJ