(help)5 axis cnc build

hi everyone 
i want to build a 5 axis cnc machine type (head head) in order to work just on foam , my workspace will be 700mm/700mm/700mm
for the software i would like to use linuxcnc and powermill also i have a little experience on fusion 360 i have just a simple version (personal use )

for powermill i have installed 2019 version and it say (multiaxis enabled)

i have done some little research but it seem that there is a lot to do , post processor , creating mtd file for my machine , ...
also i have an experience with 3 axis , good experience but with mach3 and nc studio , so i think i have some basic 

the only things that i can do is build the machine , but after i have no ideas what to do with controller (linuxcnc ,...)



i want to do like this but i will not use the same controller