Right the good is my general questions (4 &5) seem more or less top mark worthy YAY So no problem recognising chords etc.
BUT I'm still really struggling with question 1 - harmonising a melody - there seems far too many rules to learn! I would love to learn all this to start writing some music of my own and I have a real interest in taking theory further but I'm really struggling with harmony.
I play the piano but am too afraid to try to experiment with improvision (OH is an AMAZING improviser on piano, doesn't really even have to think about chord structure, whether it's root position or first inversion or sometimes second inversion etc.) No idea if this has always been easy for him or not and it's just me who is struggling massively with harmony.