where is the globe fountain?

Start at the plant base and head out to the right, or from the zombie base to the left, into the shopping district.  The fountain is at the center of this.  It's in between Chomper Pizza and ZomBurger.

you sir are a legend thank you

You're welcome.  Once you've been playing for a while longer, this stuff will all be super easy basics.  I remember when I would get lost just inside the base itself.

Doing these quests will help you learn your way around the back yard, as will doing the plant and zombie solo missions.