I didn't get into calligraphy either. :-) I just did what I'd normally do with a regular pen via the process of dipping and using a nib.
In a way it was to handwriting what paper has become to me when writing out thoughts - slowing things down, making what what was written/drawn more meaningful for requiring more thought/planning/effort.
I started because it had occurred to me that everything I put of myself into a computer is fundamentally ephemeral; it only exists when the device storing it is getting power. Once I'm nothing but a memory, everything I've created with a computer is just so many tears in the rain. But if I were to pour myself into a physical notebook, then as long as that notebook survives something of me survives with it.