Ohhh so cool that you used fisherman’s rib. It’s still on my to learn list (as is brioche) but both have to wait, because I knit continental combined style and therefore both need a different technique for me. I am hugely impressed that you figured out your own pattern and I am looking forward to see it in action (again :-D)
If you ever want to try out a pattern for a bralette, I remember Jessie Martin has some very well rated on Ravelry
https://www.ravelry.com/designers/jessie-mae-martinson-jessie-maed-designs/patterns
I never tried her patterns but love the yarn colors she uses <3