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?
So after quite some time setting up Bluefin on my external SSD and testing for all my apps and use cases, i finally cloned my install to my internal disk and replaced my previous install (Fedora Worksation). This was the smoothest distro change ever! What did i do exactly?
Install Bluefin to external SSD with Full Disk Encryption
Change boot order in BIOS to external SSD
Setup Bluefin & test my use cases
Copy over my files from my internal disk to the external SSD
Then clone the whole external disk with CloneZilla to the internal disk
NOTE: This works great when internal disk size = external disk size. When your external disk is smaller than your internal, you can expand the partion after cloning. Cloning won’t work if the internal disk is smaller than your partition on your external disk - in that case just do a fresh install.