Snail

Is your problem with the mouth organ that you get different notes on the push and pull, or is it focussing your mouth on a single hole to get a single note for playing melodies?

If it's the former (or both), then I suggest you will have problems with the anglo or melodeon as they both operate on the same principle.

If it's the latter, then it is possible that you will cope with anglo or melodeon as each button just plays one note - with the exception of the basses on the melodeon, half of which actually play chords.

If it helps, you need to recognise that the layout of the notes on the harmonica enables you to get a selection of chords (or partial chords) related to the key of the harmonica, enabling an accompaniment to be played - so the noises you get are not entirely random.