Monitor mounting to drywall



I don't know if I have a stud behind the wall.



I don't know if I have a stude behind the wall, how do I find that?
 


I mean it's only gonna be like 6 pounds. I'm sure the drywall will support that easily?
 


It will for sure be under than 7 pounds max, so 4 toggle bolts would be good?
The mount only has 2 holes though.