This might sound like a silly question, but any pointers on what might be considered good ear training exercises? Anything at all on ear training (even if it is super super simple) would be hugely appreciated!Transcribing is very useful as everyone has said. But if you're a beginner, take it slow. Do simple ear training exercises and combine that with sight singing. Start with melodies. Learn to hear intervals. Learn to transform a rhythm you hear into a rhythm you can write down.
As a composer it's invaluable to be able to hear a melody in your head while you're driving and then seeing that melody in your head as notation, without using a piano, DAW, nothing.