New photographer problems.?

hi so i just bought a rebel xsi and a fairly decent telephoto lens. i am understanding how to work it and what does what and how aperature affects shutter speed and all that stuff. im at that point. i can succesffuly take a good picture without a preset and AF and whatever. BUTT my problems are these... i bought a macro and fisheye. how to use both sucessfuly is a bit beyond me. for me, the macro is intensely close up... and the fisheye does not seem fisheye-esque at all... maybe the products i bought just arent to great, but please if you have any help or suggestions.. especially with the fish eye