As You are singer, I would suggest, that you invest on condenser mic and audio interface with mic preamp. Vocal sound is bit mushy, and if you add highs, i bet you have audible hiss. Everything else you can find free or if you buy Computer music magazine (British) there is whole home studio software bundled for magazine prize. DAW synths effects sampler and vst effects.
Your result is not bad if it is made with audio editor only. ;)