{color:red}Hi Lise!
I really enjoyed this poem. I didn't see any grammatical or spelling errors, and I really can't help with the technical matters of poetry, but for me, this flowed well.
The experience of your mission trip, though you said it couldn't be explained was summed up in the last few lines, most specifically -
Seeing people cry over new paint
Sometimes, to get the point across to the reader, you need more description/detail. But, oftentimes, when dealing with human emotions such as these, the most striking way to bring them across is found in the simplest of words, and you did a good job with that here!
Great job! I look forward to reading more of your writing!
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