In order to reduce the heat of the charcoal, let it a little while burn. Then it is advisable to sprinkle some smoked sand or smoked ash on the glowing coal and then add the incense. In this way it smells less burned.
It is advisable to not inhale the smoke from incense substances directly, but instead let it spread throughout the room. In this way, incense substances can develop their actual scent better.
Less is more: When placing incense or incense mixtures on the glowing charcoal, you should use it sparingly, as otherwise the oxygen cannot reach the embers and the incense does not burn off sufficiently. This is reflected accordingly in poor smoke.
That is why the principle applies: less incense, more smoke.