First, install the OS. Then, install SSH and configure it. Watch a tutorial for it, it’s not the simplest thing in the world. If you need not only terminal but also graphical access, then install and configure a VNC or RDP client, the tutorial is probably going to cover this though.
If you just want to learn linux though, it makes more sense to install it on a virtual machine in your windows system, or even on a separate partition.
the hypothesis that dogs learned some expressions to communicate better with humans makes sense, but some expressions like showing the teeth to express disapproval is present in various mammal populations