What do you recommend I get done with my nose to make it as natural looking and functional as possible?

Straightening your nose would likely require both a septoplasty and a revision rhinoplasty.  The photos that you have provided demonstrate that your nose is crooked in the upper dorsum and the lower dorsum.  You have not provided a "worms eye" view of your nose which would demonstrate the appearance of your nostrils and I would be better able to assess the status of your lower septum. However, based on your appearance and your description I would assume that the septum would need to be repaired as well if the lower part of the nose leans to one side.Needless to say, when the dust settles, an in person consultation would be your best bet!

A septoplasty should improve breathing if you have significant septal deviation internally... but breathing is primarily affected by the lower half of the septum while the external appearance in terms of straight versus deviated is affect by the upper 1/3 of the septum.   You would need a formal revision rhinoplasty to straighten the internal appearance.   A septoplasty would not necessarily change the external appearance.   Your external deviation is modest. I would seek more than one opinion before deciding whether it is worth it to undergo more surgery.