Accurately pronouncing minutiae is not as difficult as it might seem. Here are some simple tips that will help you correctly pronounce the word:
Start by stressing the first syllable of the word, "mi". This syllable should be pronounced with a slightly longer duration than the following syllables. The "nuh" syllable should be pronounced with a nasal sound, like "nnnuh". The last syllable should be pronounced with a short, light "tuh" sound.
When you put it all together, you should end up with a "mee-nuh-shuh" pronunciation. If you're still having difficulty, try saying "mini-ut-ee-uh" to get the correct pronunciation.
To practice saying the word, try repeating it out loud several times. Don't forget to stress the first syllable. With enough practice, minutiae will be easy to pronounce.