I use Left Index and Middle for clutch and rest for grip, and for brakes Right Ring and Pinky.
But I avoid using front brakes, coz I been to death and back, and that for more than once on my Enfield.
So my advice is to use rear brakes, but if you are stuck biking in traffic front brakes are only alternative.
You can ALWAYS try the flintstone way....drag your feet.....