It would be great if you could trim the loop to get rid of the moment of silence; from stopping what your doing to stop the recording of the loop.
Sounds like you need a foot controller. That's how pretty much all looping works, when recording instruments that require the use of your hands.
There are some pretty nifty and cheap DIY controllers that folks have made from used game pads, keyboards, etc. Or you can just bite the bullet and buy a MIDI controller.