Well there is not much to set up.
First - get your audio level right, so its loud enough without clipping (too high volume).
Second - get rid of all background noise (close windows, make your PC silent, tell your neighbors kid to shut up etc).
Third - get the right distance. Condenser microphones produce a different sound from close range (15cm or lower), increasing the lower spectrum. Rappers often use this trick to sound deeper. Try it, record from 50cm and then from 10cm distance, look what you like better.