I think that I may be an odd bird in that I seek out conical bowls, that and other things. But, great suggestions above. You might also try just holding the soft flame lighter about a half inch or so above the bowl when you light it. Draw the flame down to the tobacco with your breath. Also, I don't fret over lighting the entire surface of the tobacco. It is heated tobacco surrounding the cherry that gives me the flavor.
Also, I mostly smoke my cone shaped bowls while working, so I clench them and just keep a very slow breathsmoking cadence, not ever really paying much attention to the chamber. I may subconsciously tamp once or twice while smoking, not sure, but I generally just keep it going till it goes out. Like riding a bike, you have to think about every movemnt at first, and then latter, you're peddling, steering, and braking without having to think much about it. I may or may not notice that as I get closer to the bottom, the flavors (especially of Virginias and VaPers) taste so much more rich at the bottom. Mostly not notice.
It's no big deal to have to relight. Don't fret it. Still, just hold up the lighter, keep the rim parallel to the floor, spit on the rim of wanted, and draw down the heat from the flame into the chamber. The flame itself doesn't have to visibly touch the tobacco.
Hopefully, you'll be smoking without really thinking about it in no time. Good luck.