[uh-oh]

just get audacity or reaper. i know audacity is free, reaper still probably is too

you dont need much to just record vocals

if you want a non free program, look into adobe audition or sony acid pro or something like that

cubase will work but it might be a bit much, you can make beats with that and all that i think but its a bit advanced i think

audacity is probably the most simple/straightforward one