The Android app isn’t a Core and Linux Roon Server is compiled for x86_64 only. What chip is in your Chromebook and what OS were you thinking of running ?
Two GB feels low for RAM for the Core. Four is reccomended for Roon.
Four GB is strongly reccomended for Roon Server on a NAS. Two GB is required but could result in inferior performance.
This comment by Brian sets out some of the thinking behind minimum reccomended specs.