I don’t have an impact wrench, I might get lucky and be able to borrow one. Thankfully the puller isn’t as extortionately expensive as an impact wrench.Do you have impact wrenches, the nut will have a washer on it to keep it in place too, make the washer flat and start with attempting to remove the large nut, it's gonna be tight.
Now you gotta figure out how to put some pull on the flywheel without damaging anything.
Very careful use of heat might ease disassembly during the course of removing the flywheel from the taper shaft.
Heat expands the flywheel off the shaft, if you can pull it before the shaft gets hot and expands too.
... and don't set fire to the bike or yourself doing it, you don't need that much heat if the shaft is cold to start.