In the US most kids learn with pencils. When I was a kid we used wooden pencils until mechanical ones were eventually allowed and ballpoint pen usage typically was discouraged until high school. I settled on smooth flow liquid ink ball point type pens for extensive handwriting nowadays.

I'm Finnish. We also start with wooden pencils and graduate to either ballpoint pens or some kind of fineliner marker. I am the only person I know with a fountain pen who actually uses it for normal writing. Mainly because it hurts so much less.