For the moment, it seems to require a x86-cpu:
There is a bit of experience with ARM devices, mainly with the NextcloudPi project, they have an overview of supported current devices: What modern hardware do you recommend for NextcloudPi? and you’ll probably find a few more with some experience performance-wise for the general Nextcloud usage.
If you start with something new, I’d rather take a look with existing hardware first to get a closer look if that something you’d like to continue.