Congrats on the purchase. You'll have fun.
I am kinda thrown off when you are asking if you need a macro lens with this camera. Remember, this is not a specialty camera. There are specialty lenses (TS-E 17L, for example), and the Macro is one of them, but the magic is NOT done in the camera.
I am sure someone will say to buy a book on aperture & exposure, which is a good suggestion. The best is to go out and practice.
What filters did you buy? Where did you get them from? I am hoping some Best Buy D-Bag didn't con you into getting something that was A) cheap quality B) something you didn't need C) over priced, or D) a combo of any two or all of these. What kind of tripod did you get?
The reason i ask these are for several reasons, and everyone has their own preferences/experiences/opinions on this. A UV filter for me is worthless. I have been shooting for years and years. I live in the PNW, I am in the rain all the time. I have shot on the beach, shoulder deep in water in streams, etc. I have had no problems with dust/etc getting onto the lens. The lenses (especially the higher quality ones) are coated. They are quite hard to scratch, believe it or not.
I just don't see the point in putting another piece of un-needed glass on top of my lens. If you must get a UV filter, don't get a cheapo $10 UV filter. As much as I diss-like UV filters, there IS a MAJOR difference between a B+W UV filter and a Tiffen UV filter.
Also, get THE BEST tripod you can afford. Always makes sure the LEGS AND THE HEAD can handle the weight of the camera/lens you are using. While some legs can handle 15LBS, some heads can only handle 7LBS, which will present a challenge. My last tripod was a bogen 3001PRO with a 322RC grip (not the best, but i love it) and it lasted 8 years. I sold it to upgrade. I still have the same head. I used to have a velbon (or vivatar, whatever they sell at walbogs or target) and it tipped over in the wind, along with my gear. They don't call the Canon EF 50mm 1.8 a thrifty fifty for nothing.
Sorry for the rant. I hope you can decipher some useful info from this post.
A cable release is also a NEEDED accessory. I got a rip off brand on ebay for $7, but the Canon brand for the Rebel line is $22 or $25 bucks. Plus they have the RC1 (something like that) that is wireless for $19.99. Also use MLU when taking long exposures.