I’ve been writing in all caps since kindergarten because that how my parents write. I can write in lower case letters, but it takes more thought and effort. I usually make the first letter of a sentence larger than the other letters. I do the same with proper nouns, and I was wondering if I would get points marked off for it.
I’d say that would be OK as long as your writing is legible and you make sure to exaggerate the size of the capital letters.
You can always check the website or call to ask about printing.