That's lovely. I love the back slight cutout too.
I think it's a matter of finding what dress suits your shape and buying that over and over in different guises. I very much suit an empire line, no high necks, above the knee or very long. Below the knee is OK but I feel odd in that length.
I have a really nice belt to cinch me in under the bust - apparently draws the eye to the thinnest point. So they say. At the minute I'm 14-16 5ft 6, 36gg. I can't just put any dress on any look good despite being curvy. I have a tummy but it's all about learning to dress for your shape.
I buy the same brand of dress in different patterns, in a size that accommodates my natural weight fluctuations (medical, completely outside my control). I buy hellbunny /collectif mostly . Not really mn style but I'm OK with that.
I was out last night after over a week in bed with this crap virus, and was fussing trying to fix my hair in the loos. This lady told me how lovely I looked, my dress, shoes. Hair. I must have just reeked lack of self
confidence. So that was really nice of her.
Don't give up op. You will find your dress. It just takes time.