What to wear to a 50th

[Ichangedmynameonce]

I'm going to a 50th. Dressed up, but not smart smart, if you see what I mean.

I'm 51, a stone heavier than I'd like. 5ft 6 but with short legs. Pear shape.

What can I wear? I live in carrot jeans and adidas sambas.

Thanks

My ideal would be something from the A/W Alemais collection - dress or separates:

https://alemais.com/collections/fall-26?page=8