You can reset your skill points in Enshrouded by selecting the relevant option when interacting with the Flame Altar at your base. It really is that simple, so you won't need to worry about intricate mechanics at all.
You can find Runes in Enshrouded through a variety of ways. The currency itself is fairly common, which is why you're likely to acquire hundreds of these as you boost your character further.
[
add
]
[
|
|
...
]