Anxiety help needed. New instal of Hana ML

you want it ’right’ not only for sound, but for proper contact down in/with the groove walls, reducing wear to the grooves and the stylus.

buy yourself one of these mirrors which is the thickness of an lp

https://www.amazon.com/gp/product/B07T31MRZ9/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

now, for azimuth, simply carefully lower the arm/cartridge down onto the Mirror.

View from the front, ANY deviation from straight will be shown/doubled in the mirror. adjust for straight reflection, tighten.

tighten what? various solutions:

either the stylus is straight to the cartridge body, then you can view/use both the cartridge body and stylus.

or, stylus is slightly deviated from the cartridge body, in which case you view only the cantilever and stylus.

fixed headshells in fixed arms

may need a shim above the cartridge top on one side to adjust the cartridge for proper azimuth. PITA.

some fixed cartridges in arms, the arm itself can be loosened, rotated, tightened. tedious, but easier than shims. mine, but they put the allen set screw in a difficult to reach location, tedious, PITA.

does your arm have a removable headshell?

is there a bit of play/rotation in the fitting you can use to rotate left or right a bit before you tighten the headshell in the socket?

some arms like micro-seiki have adjustable fittings in the arm end, loosen, rotate fitting, tighten. some have a small screw in the bottom of the fitting, loosen, rotate, tighten

some headshells allow azimuth adjustment: you rotate the front body of the headshell relative to it’s own fitting, loosen, rotate front headshell portion, tighten.

Elliot, the OP has a slightly deviated cantilever. We know nothing about zenith or azimuth. True, the very slight deviation in cantilever can be compensated for during alignment using the grids provided on the Doctor F and most other protractors. I find that difficult to do with all but the Smartractor. 

I have had cartridges with the cantilevers slightly off, but looked fine when playing a record. Welcome to the world of analog. If this bothers you, call your dealer. That’s what they get paid for. 

Probably not a great help, but recently I've taken to aligning the cantilever and giving the cart only a fast check to make sure it's not way off.

Given the different cart body designs, aligning the cantilever seems to be easier and in my mind, makes more sense.

Technically, that's what you should do, align the cantilever. The problem is that for many cartridges, the cantilever is very hard to see while the cartridge is sitting on the grid of a protractor.  Only a few protractors provide help, like the Smartractor.  At the very least, you need a bright light and magnification to get it right.  Also, since you want the cantilever to align with the cartridge body longitudinally, then its just as good to align to the cartridge body if it is squared off with respect to the cantilever.