An excellent first trip report, with some good pics ^
Always nice to hear of someone's first experience in a premium cabin.
Just a few technical points; the MAN lounge is still branded as 'Terraces', as it hasn't been refurbished into the 'Galleries' concept yet. Also, the Galleries Club in LHR that you visited looks like the Southern one from your pictures, not the Northern one. But I'm being picky.
Hope you write some more trip reports soon