Salve!
I was just wondering, where, in a Latin sentence, would an adverb usually fall?
Also, how do you order multiple adjectives–e.g. “my small, green ball”?
Bene facis. 
Adverbs usually come before the word that they modify.
It is sometimes considered bad style to have a string of adjectives modifying the same word, so you will often see them joined by conjunctions (et, -que etc), rather than commas (as in English).