A Closer look at に

In most cases the particle へ can be used interchangeably with に. But に has a wider application so for now just stick with に

Showing movement toward... Like 'to'

日本に行きたい。　
nihon ni ikitai.
I want to go to Japan. (direction TO Japan)

どこに行きたいですか。　
doko ni ikitai desu ka.
Where do you want to go?

Meaning 'on' or 'in'

紙に絵を描きました。　
kami ni e o kakimashita.
I drew a picture on a piece of paper.

In time - 'at'

六時に会いましょう。　
roku ji ni aimashou.
Let's meet at 6.