H&M have lots of great casual things.
Get a few new pairs of leggings, some flared/ wide leg knitted joggers, and some supportive gym leggings all for lounging around the house.
Some nice trainers you like and that are a bit more stylish, plain white maybe?
Top half, chunky cardigans are fashionable at the moment, with a thick vest under.
Thin knit jumpers, oversized to cover bum, looks more out together than hoodies.
Try and stick to maybe three colours, so everything matches. If your cool toned, grey blue and black. If your warm toned, cream, beige, and navy.
They also do great "slim mom jeans" in lots of colours that are comfortable compared to skinnies.
You can still be comfy and play with your daughter but wear more put together lounge wear!