Inclined to agree with ludnix, I could recommend lenses for your to buy all day. Do you really need those lenses? That is up to you. It's kind of like recommending lights for your reef tank. I can say get 250w metal halides with an icecap ballast (24-70 f/2.8), but if all you plan to keep are mushrooms, you can get by with a FAR less expensive setup (18-55).
DSLR photography is all about specializing. You need to know exactly what you are taking pictures of and buy equipment specifically designed to take those kinds of pictures. Point and shoot cameras are "jack of all trades, masters of none" cameras. DSLRs are "absolute masters of a select few trades" cameras. Of course if you spend $1,000,000 they could be "absolute masters of all trades" lol.
The point is you bought a camera designed to specialize, and you need to know exactly what you want to specialize the camera to shoot before you go buying stuff.
Croals? 100mm f/2.8 macro or 180mm f/3.5 macro
Fish? 24-70 f/2.8, 17-55 f/2.8 IS, 50mm f/1.4, or whatever
Wildlife? 70-200, 500mm, or whatever...
Portraits? 135mm f/2, 85mm f/1.2...
Sports? 70-200 f/2.8, 400mm f/2.8...
Each category (and sub category) requires certain equipment. Unless you are a millionaire you aren't going to buy ALL of the equipment for every job, so you need to figure out exactly what you are going to buy before you buy anything.