Creating a Linux LPAR on 9009-41A

Time to make a bit more use of the 9009-41A I have, so I'd like to add a Linux partition.  It's been a LONG while since I have done any partitioning and the last I did was using VIOS on the bladecenter to do the work (which was remarkably easy).  Poking around the web, I see a lot of outdated info.  Anyone have a reference handy that would apply to a Power 9?  Right now it only has an IBM i partition running.  There is plenty of disk.  I am going to add some memory.  I have a vHMC that manages the system.

I know there are a few ways to skin the cat here.  Just looking for an up to date reference to get me through the basics.  Closest I can find is here:

https://www.ibm.com/support/knowledgecenter/POWER9/p9hdx/p9_create_virt_env.htm?pos=4

But if someone has a great recipe for creating Linux partitions, that would be helpful as well.