Surely the whole point of the thread is that the OP’s body shape has changed to the extent that she never needs to think about it again? She now has the freedom to wear anything built on a petite scale (whether by design or alteration) without restriction.
This must be wonderful for you, @3smallpups. My first thought is - are you an Industry fan? I’d strongly suggest you watch Season 4 with a close eye on Harper’s wardrobe. The costume department has had a field day, kitting her out in swoon-worthy business and casual clothes, mostly of a type - voluminous coats and wide trousers - that this board would have you believe no one of 5’1 should attempt. She looks utterly fabulous.
Beyond that, how do you want to dress? I’m sure you must have other ways to spend your time beyond shopping and coffee, but even for those activities there's an infinity of options and choices. Athleisure or ladylike? Academic or goth? Tweedy or leather, or both, And, of course, unless your evenings are very specific, daytime casual wear merges into gig/ theatre / opera / cocktail dressing.
And you’ve mentioned places you’ve bought from in the past, but what sort of budget are you considering for your new wardrobe? High St or Net-a-Porter?
For an overview of some of the best of what’s in shops now you could start with
https://www.collagerie.com/en-gb/
which covers every price point from supermarket to couture. Then investigate any brands that appeal to you and look as if the scale of their clothes would work. (Bearing in mind that almost anything can be tailored to fit.)
Exciting venture!