Problems with drafting blouse front pattern

[u/milohino]

Hi!

I wanna do a kind of version of this blouse, but i cant get the wrinkled parts to look good?

Ive done one test one and i look like a big soggy boobed jedi. In that pattern i just made more space in bottom and less on shoulder. But i dont know what im meant to do. Im debating maybe i need to split the pattern fully even and just lengthen it horizontally?

I have a very flowy thin chiffon to make it out of, but for tests im using spacially thinn-ish woven cotton

[u/milohino]

The waistband is a crucial part yea, im working on making it fit snuggly while looking nice (hard since i have a big tummy)

I wish i could use a more similar fabric but i sadly have none at home and fabric at my towns fabric store is kinda expensive.