Not bad for a first attempt!
The flowers could do with a little more colour saturation though to make them really stand out and possibly a bit more sharpening too applied in post processing.
I like the blurred backgrounds. What lens did you use and what camera settings? Taking those kind of shots I would go into the menu and select "vivid" from the colour options and probably use an 85mm zoom setting or telephoto. A dedicated macro lens would be best but I don't have one and can't justify the expense of buying one. Nikon make a couple of good ones though at 60mm and 105mm. If you are seriously going to get into macro shots then better start saving your pesos!
I wish you well with your new camera. I am sure you will have a lot of fun with it.