Those instructions look pretty good, but I think I would change the growing medium a little bit, by adding some course sand to the mix…and probably more of the sand than the perlite.  Pineapples are in the same family as Bromiliads and prefer almost dry soil to wet or soggy soil. Many Broms are grown well without any soil at all.

I have successfully grown pineapples in my back yard for years without any soil amendments, and we have Myakka sand which is the crappiest soil on earth (it doesn't even qualify as "soil" LOL) and I have even managed to beat the raccoons to the pineapples a few times. :)

I have 6 pineapple PLANTS (not trees) currently.

All I do is cut the top off a pineapple with about 1/2-1" of "meat" attached.  I let it dry on my kitchen counter for a day.  Then I fill a pot with what ever potting soil I have (nothing fancy and NO additives), sit the pineapple on top of the soil & add just enough more dirt to cover the "meat" part.  Water & sit where it will get lots of sun!

The larger the pot you put them in, the larger the plant will grow.  They can stay outside during the summers but unless you live in a tropical climate they need protection during the winter or brought inside.  Mine go into my little garden house for the winter.

Just remember you have to be really patient….it won't make a pineapple for well over a year!