Most sound interfaces have drivers that let you select the right or left side as mono tracks in addition to the stereo. So it should be easy for you to select either the left or right as the "input" in the "input" drop down selector.
If you don't have those choices you can look in your Audio options to see if the input choices are listed but not "selected" as active.
If for some reason that doesn't work you can always record as stereo and split the left and right channels later.
It's fairly routine.
You should anticipate that the clocks on the DAW and the camera will drift so every now and then you'll have to slide to a new sync point.
If you can grab a second camera, you can use "cut aways" as convenient places to get back to sync.
Have fun.
best regards,
mike