For what it’s now worth, this has been my way so far (which by the sound of it may be why I’m unsuccessful): load kindling, one log and a couple of firelighters, light fire, keep control open and also door.
Close door after 3-4 mins, wait until log is burnt on one side then turn it over, wait until its burnt through then add another log then repeat turn and refill.
Not getting chance to watch tv properly as I’m constantly watching the fire!