OP - I'm sorry if I've missed it somewhere in your posts - but what is your height? As that's pretty important.
Also, you said you wanted some new fashion for your new shape. Even if the clothes you posted photos of did still fit you, they're all dated now in terms of print & style (not a criticism, that's what happens in fashion!!). The dresses/skirts also look too short - they don't lengthen you. And I agree that the b&w trousers aren't a good look.
You mentioned you like neutrals - for summer as well as now? So white/navy/camel/black/khaki? Any other colours you like as well? Do you want clothing to be mostly in that palette so that you can mix & match? What were your favourite shops before your shape change/weight gain?
Do you prefer plains or prints, or a bit of both? Florals/stripes? Are you after dresses &/or separates, stuff for day/evening &/or casual/dressy?
Btw, you'd said that nothing would help with your stomach. Nothing will magic it away, no - but I think there will be plenty of options for pants that help smooth, with a bit of added control in the stomach area. What kind of knickers do you wear now? As I need high-waisted "big pants" with tummy control. They make a big difference under skirts & dresses especially.
(I've also posted some links above for bra companies that offer an L/M/N cup.)