I'm also new to EDF, though I have almost 40 years in R/C, the last 10 electrics.
I was looking at the same motor for a 64mm fan unit. Go to the bottom of the page for this motor at HK, below the reviews, and click on "click here to see all reviews".
You will see a number of bad reviews that say the motor is not suitable for 4S lipo !!
You'll need to know and be sure of the diameter of the mount for the motor in the fan unit. Most will take a 24mm motor but some like this one
will take a 28mm motor.
I also considered this motor
at HK because it should be capable of lots of watts on 3S but would definitely need a heat sink and 4S is possibly a no-go.
So, I bought this motor
on eBay, because its rated for 4S and is 34% less expensive than the HK
(I havent received it yet).
The shark looks like a lot of fun !!