Assuming a SN (conductive might be reversible) it’s more than we would usually see, but not exceptional: you’re an outlier in terms of age but:
Flat losses are easier to fix.
You’d suit a IIC/CIC if your canals are big enough, plus the manual dexterity needed for the smallest hearing aids.
You’ll adapt better and faster to hearing aids at your age than you would in 30/40 years time.
Get the best you can afford and don’t be put off by feeling a bit bunged up for the first 2-3 weeks. It’s also possible, that’s what’s causing the decline will burn itself out in the medium term.
It’s not a noise or age-related loss, forget getting any meaningful results from a scan, the a bilateral balance of your loss precludes practically every ‘visible’ diagnosis.