Lost my ability to dress up nicely, pls help

[Helloword]

I have no sense of style. I used to dress nicely in my 20s amd 30s but now in my early 40s, I am 10 ks heavier with a round belly and flappy arms.

I have a business event, dress code is smart casual. I am 5'3", 60.kg, size 10 but recently bought a loose fitting dress from Zara in xs size.

I want to get a nice dress which I can wear both day and night time. Not too businessy but not too informal. I spent a lot of time on websites and I am lost. Please help.

Love this one

Hobbs have some good ones; this one
https://www.hobbs.com/product/malikah-dress/0123-5466-9045L00-RHUBARB-RED.html#navAjax=true&is=true&cgid=clothing-dresses&sz=60&start=0&isSecondPage=false&prefn1=refinementColor&prefv1=Red&pid=0123-5466-9045L00-RHUBARB-RED&pos=12

or

https://www.hobbs.com/product/hatty-jersey-dress/0123-5887-9324L01-NAVY-IVORY.html#q=Hobbs%20Hatty&is=false&sz=60&start=0&isSecondPage=false&pid=0123-5887-9324L01-NAVY-IVORY&pos=0

Or lots of others

Faux wrap dress with short sleeves and a busy print helps hide any lumps and bumps around the waist
https://www.macys.com/shop/product/24seven-comfort-apparel-womens-knee-length-faux-wrap-short-sleeve-dress?ID=16037415&CategoryID=5449&swatchColor=Blue%20Multi%20Multi

Have you looked at the Winser miracle dress range? I think they would work well?

Maybe this:https://www.boden.co.uk/en-gb/notch-neck-mini-shift-dress-ivory-paradise-paisley/sty-d0554-ivo

it comes in a long if you wanted more length.