I think accessories are a bad idea with small kids, they pull them!
For me wearing dresses was a discovery. I buy machine washable ones (mainly cotton or viscose). Underwear on, dress on, shoes on. Done!
Then again, I am not the sort of mum who ever went down the slide with her kids, I sort of watch from a respectful distance with a cup of tea!
I have some fab dresses from Whitecompany, Joules, Phaseeight, Mint Velvet, people tree (lovely stuff, a bit retro) etc.
If I want to avoid looking too mumsy, I wear them with cool ankle boots (not mum boots natch) and oversize scarf or card or leather jacket for warmth.
In winter, add tights and thermal vests.
Personally I like to mix it up (floral dress with biker jacket for example).
It has taken me years to find my own style, and now I stick to it. I rarely wear jeans as, actually, they rarely flatter me and are not actually that comfy.