Guild Wars 2

Hello.
Is there any guide or something like that to understand where is better to put the first mastery points in?

I have Gliding lvl 2 and mashrooms(Itzel Lore) level 2 , BUT i start to feel not safe because when i look at my hero pannel , i only have 8 mastery points left , and i only unlocked the first map(Verant Brink).

When i go to the second map for example,there are places i cannot pass/cross because vines blocks the road , or because there are passages i cannot cross / door i cannot open Ley Lines i cannot ride/fly on.

What to do now?Focus on gliding / mashrooms , or start something else?

What is necessary to jsut be able to walk around and gather some other Mastery Points in the other maps?