Im giving a go fedora silverblue on a new laptop but Im unable to boot (and since im a linux noob the first thing i tried was installing it fresh again but that didnt resolve it).
its a single drive partitioned to ext4 and encrypted with luks (its basically the default config from the fedora installation)
Did you reformat the disk before installing? I've seen similar fails when the disk is still encrypted. The installer can't get a hold of a previously encrypted disk. If there's no valuable data in the disk, load up a live distro run gparted and nuke the disk blank and pristine again, as gparted doesn't care about encryption. Then try the installer again.
You should let the installer do the partitioning. Silverblue and immutable systems are nitpicky about it. Specially if luks is involved. The whole point is that you shouldn't meddle with the system at a low level at all.