Is this going to look terrible?

[OneFrenchEgg]

I have ordered it, I love it in theory...I'm 5'8 and a size 12 atm. Usually wear casual stuff. (Jacket not trousers).
I saw one on someone in a film, and this was the closest match online via google search terms I could think off!

It's quite shapeless but you don't know till you try it on

The jacket looks ok. IMHO would be better with more fitted trousers/skirt.

I think this might also be it?

https://www.flannels.com/free-people-dolman-quilted-jacket-325570?cqsrc=googleeads&cqcmp=17608727432&cqqterm=&cqplac=&cqqnet=g&cqplt=gp&gclid=EAIaIQobChMI8onkyefHHgIVVsDVCh1aIQwPEAQYAiABEgLulPD_BwE#colcode=32557004

Yes this is what I'm thinking. Other pictures online look really nice.

Yes, I'm thinking slimmer trousers/jeans and maybe dresses.

I think one unstructured/loose item can be ok, if you are slim, which you are. Two together looks less good.

I do like unstructured stuff, this is the one I found first . Obviously not planning as beachwear