I feel your anguish. When taking advises, please remember to evaluate who advises, especially on forums. There is a lot of people out there sounding like they know what they are talking about (like me) but are not experts. In such serious cases, I'd make sure I heed what experts say. If 100 low-level hobbyists with unknown (to you) reputation say this and 1 ichthyologist or a vet says that, I'd side with the professional. Just as an example. There are plenty of disagreements among professionals too but they are about much more complicated things, trivial (on their level) things they usually agree on.
There is no rush, BTW, either. Your fish is fine and will be fine. You can continue searching for a quality trustworthy advice. Having a gill curl causes weaker flow of water over the gill, so fish has to take breaths more often. If you'd like to compensate for that, make sure your water is as aerated as possible, is all.
Having had a long history on PCF, I would advise you to seek a consultation there too. You will see it.