Should i be concerned about my 32 month old son's communication?

he can say lots of words very clearly, more than i could possibly count. he knows the alphabet, recites nursery rhymes, knows shapes, colors, counts to 40, so he's fine in those areas. it's just that his talking is more about observations ( "cat in tree", "take dada to work", "put on shoes on") rather than about communicating with us. if he wants an apple he will say apple, but if i ask him a question it's like he ignores me. i hear other kids say thoughts from their own heads, like "we saw a dog at the park." if i ask him "what did you see at the park today" it's just nothing. he will follow instructions like go get your shoes, so there is some comprehension there. but if i ask him how old he is or what is his name- nothing. also he talks lots of gibberish. runs around in circles blabbering "words" i can't understand. sometimes i can pick up a word and realize he's reciting a book, but often it's complete gibberish. i'd say he talks 50% clear, unmistakable words, and 50% gibberish. and as far as sentences go i'd say he has around 25 3-4 word "sentences", but again, they are mainly observational and not communicative. sorry if this doesn't make much sense, it's really hard to describe. he's my first and only kid and i'm a stay at home mom so i wonder how on track he is. thanks for listening!