You can try the “more > copy link to fediverse”
But you shouldnt have to browse kbin.social then copy that link to a url formatted for you instance.
On your kbin.cafe you could try /d/kbin.social to try and do a link too. Might just need to follow the /m/ on other instances to see the posts from other kbin and lemmy instances.
It is doable to install an OS onto a flash drive or external drive, but from my experience it was really slow. Just need to make sure to then boot the machine to the USB device. Some machines you might find it difficult to change that in the BIOS.