Cherries My god you really need new friends! Drop that horrible RL one straight away she really is Not your friend.Friends dont do that ..
(its not the same one who was horrible to you last year about your weight loss is she?) Get Rid..
I used to work at a university , and have helped organise and staffed many a graduation and 'after' party .. You really dont need to dress up like its an Effing wedding.. Your friends are just plain wrong.. . Yes some 'mums' do (and many look like they are trying way to hard) but loads more dont and its about celebrating your DD. Not what effin shoes and dress the mums wear.. You really, really, really, really do not need a hat nor Melania Trump 'fuckme' shoes.. Hats are a total pain anyway and no one sitting behind can see through them anyway .
You'll be sitting in a hall in a ceremony (in a small seat with lots of others ) which will be several hours long constantly clapping people.
waiting for the moment when your DD joins the queue for the stage presentation ,(which will take 30s max) and after there will be photos ( which dont need to show your feet!) and maybe a dinner or party.
DD wants you there as YOU, and You not in a wheel chair!! ,and you looking cool in on of your lovely outfits ( and super cool in your trainers with it ) That is what its about.. (really , sorry if i am being a bit hard) ..
....and dump that 'friend' and your FB feed, you really dont need it ..
What a fantastic offer from Gin , it would look fab with trainers , and so would the current star Kensington, or the Lilium or any other dress.. or jumpsuit / etc etc