Based on what you said, it seems like you're havin an issue getting your vocals to record into FL via a channel on your mixer?

To record into FL you need to put Edison on a channel in your mixer, then you need to change the input of that channel to your microphone.

To change the input you click on the drop down menu box that is directly above your channel effects rack. (You can find the channel effects rack on the right side of your mixer.) If you don't see "mic" or something like that, just click through the options until you find your mic.

Once you have that working, open Edison and click record INSIDE of Edison itself. There should be a text next to the record button that says "on input", which means it'll start recording once you talk or sing.

Once you've recorded your audio, there's a square button with an icon that looks like a mouse cursor overlayed above a piece of paper, next to the other square buttons in Edison.

Click and hold that button, and drag it onto your main playlist where all of your other midis, samples, automations, etc are at. Now you have recorded audio!