If you're concerned about disturbing your neighbors, consider a microphone acoustic isolation shield. They're really for reducing sound reflections getting back to the mic, but they do that by absorbing the sound of your vocals.

Bob describes the technical/social aspects really well. I'd consider going to a more sophisticated DAW like Cakewalk Sonar. It's free. With upgrades, I paid thousands of dollars for Sonar over the years before it was free, and it was totally worth it. It is much more capable than Real Band, EXCEPT Sonar does not have BiaB integration. BiaB's DAW mode and/or the new plugin makes up for this in my opinion. Good luck!

DC Ron
BiaB Audiophile
Presonus Studio One
StudioCat DAW dual screen
Presonus Faderport 16
Too many guitars (is that a thing?)