Patsy Bergstrom

Hi guys,
Im the biggest overthinker in the world and am completely lost as to what shirt and tie combo to wear with this suit for my upcoming wedding.
Shirt is light pink, suit is sage green and tie is dark green knitted material.
Is the pink shirt too much? I know a white shirt is more classic and I dont mind being different but it has to work obviously.
Ill be wearing light brown shoes and a lapel flower thing if that matters.
Open to suggestions on the tie also. Thanks.

The first picture is the suit I'm wearing for my upcoming wedding.
The second is a pair of brown shoes I already own and the third is a pair I'm thinking of buying.
My question is
A) would i get away with my current pair to help out on budget. They've only been worn twice but do have some creasing etc.
B) do the second pair suit the overall look better than the first?
C) is there a different colour and style altogether that you would suggest?
I don't have many people to lean on in terms of advice so any help would be appreciated.
Thank you.