Hi, Cheryl Anne.
Welcome to the forum!
Nice song and vocals!

It sounds like you were playing BiaB on the computer, and singing the vocals into your Zoom. Which is fine - anything that gets the job done is good!
But I'm pretty sure that the Zoom can also function as a USB microphone with your computer, so you can record your vocals directly into BiaB.
There's an
Audio track in BiaB, and pressing the red
Record Audio button on the
Transport toolbar - not to be confused with the extremely similar red
Record MIDI button sitting next to it

- will let you record the audio track.
Of course, you'll probably need to wear headphones so the playback doesn't record into the vocals.
The advantage of doing it all in BiaB is that you can adjust everything with the built-in mixer, as well as add things like reverb to the vocals. You can also "punch in" and just record a portion of the vocal, so you don't have to re-record the entire track if you want to do another take of a verse.
Just a suggestion you can feel free to ignore!
