you can use a bed sheet for a background (starting out)

... thats what we did... or you can get a Savage paper roll from
B&H Photo for less than $40 (paper backdrop). i wouldnt use a table lamp for the reasons mentioned above. i would also not use the flash from the camera on the subject cause it will leave a "flashed" look on their faces (assuming you're photographing people). you can try putting a white piece of paper over the camera flash, you may get mixed results.
i would invest in some kind of lighting equipment (the whole kit about $300) .. if you dont want to invest that much. i would go with at least one slave flash with the umbrella (take umbrella on/off to test results) if u dont have enought light, take the umbrella off and point it towards the ceiling (my hubby does this a lot for out of studio assignments).
another suggestion, you may want to play with the camera settings (not sure if ur on digital or film) ... but what i do is raise the iso level (on my digital, but u can buy the film for this). the white balance may be between 3500-4700 but still may leave a yellow cast on the face, so some photoshop may be required.
im not sure if you want to take "candids" of friends and family

.... but i think once u've stepped into the photography world .. no photo is just a "candid shot"
