I decided to follow the tips in the Docs and test and setup my Bluefin on an external SSD (with LUKS) first before commiting. Turns out it works like a charm! Jorge wrote you can then just move that install to the internal disks and it will work. But how exactly? Do i need to create special partitions? Just copy paste the contents of the external SSD like a regular file?
Appreciate the hard work you guys put in!
I just swapped the disks and everything worked, no configuration needed.
See also Jeorge’s YouTube video: https://www.youtube.com/watch?v=5DRaYQ6hKU0
Good to know! I use an external SDD, so no swapping here. But i found a thread on the Fedora Forums on how to clone a drive with GParted.
I decided to test the external setup a bit longer before moving to the internal disk. I will update later on how the transition went.
But yeah, love having a fully setup, ready to go OS on my portable SSD 
I started with an external drive as well for about a month (late last year).
I have my home dir backup to NAS automated (for several years now). I created a new rsync share for bluefin and backed it up from the external drive.
Note the internal and external drives are different sizes.
When ready to commit I simply reinstalled to my internal drive and restored my backup. It was completely seamless for me.
EDIT: I should mention I chose automatic partitioning for both installs.
Another option to consider.