The great thing about Runes is how versatile they are.
You must learn the runes in order to use them. You can carve them on trees, or get a marker and write them on stones, you can even get a stick and draw them in the sand. It really is all up to you. If you dont want to utilize any of those methods, Ive found tremendous success just by visualizing a rune in my vision, and projecting it out in front of me while galdrring its name.