Hi Isaac
Welcome to Brisbane, we've got a lot of different spots and most are decent for beginners.
On the Northside you've got:
Sandgate (
goo.gl/maps/3C96JmmSas6fhRLv8)
Brighton (
goo.gl/maps/ShifYjm3FdD3UEtT9).
Both spots are within a stones throw of kite shops and have their own group of locals that frequent the spots.
On the Southside, there's a few spots:
Wellington Point (
goo.gl/maps/qU9Wnp7zvqL9bKPW9) - a little more sketchy than most, tide dependant
"LOTA" (
goo.gl/maps/jzyonpG64Ccbz36cA)
Victoria Point (
goo.gl/maps/ivjR922wP1roWbVk7)
Thompsons Beach (
goo.gl/maps/g78LqKkhGHmyZ9HV6)
Head to whichever is closer when the wind is up, and talk to the guys and gals at the beach. Don't go out by yourself until you get the lay of the land.