Map Confusion

[RBHarmon]

I don't understand how to properly read the transition between zones to get close to enough to to the quest marker in green to complete the quest. Its even worse if i need to find where say fungi are or something along those lines. I know when I am in the zone the red circle will show up I just don't know how to read the map well enough to get to those zones

[Mommathor]

I will zoom in and out on the map using the plus and minus symbols on the right side of the map to better gauge where I am in relation to where I want to be. It was hard for me to figure it out at first. HTH