I've never ordered from Shein.

I think something like this would be flattering. I would pick a bright color.

https://www.amazon.com/ANRABESS-Dresses-Pleated-Evening-529-zangqing-L/dp/B09XD4FZP8/ref=sr_1_4?keywords=maxi+dress+slit&qid=1657565084&s=apparel&sr=1-4

This is similar.

https://www.amazon.com/dp/B08YJX8HNR/ref=twister\_B08M9GGR8M