1 and 2 are too crowded and don't have a definitive subject, but 3 is good. Just try not to center your subject too much.
Also, may I suggest setting your white balance manually...it changed with all three of those photos so the same flower is 3 different colours...
for #1 and #2 you should take a focus on your main subject like you did on #3,and watch for off subject things like the twig behind you main focus on #3
Realy nice shot for first time with new camera(crowd/bright color, wich is normal with a new toys bring me some more =)