Congrats on a beautiful suit,
I could see it with lots of variations; light blue or pink solid shirts, try it with finely striped or micro checked shirts as well (although that might clash with the texture of the suit fabric).
Dark grey or navy ties, e.g. wool or grenadine. Solid or with a subdued pattern.
Burgundy or dark brown shoes would be perfect
Actually, the only limitation I can think of is too large patterns on shirts and tie, but the over check is so subtle,...
Polos are brilliant casual wear, actually as casual as I will ever be seen outside of the gym.
Having entered my forties, I always wear shirts with collars, i.e. the polo has become what the t-shirt was when I was in my twenties. Dress your age, as they say.
For the office? Possibly if you work on a Saturday in July.