I start with a chimney of lump. When it's ready pour into the firebox. Add 3 splits. Mine are 16in long and I cut them into smaller diameter. Lay 2 side by side on coals with space in between and the 3rd across those 2. Intake and exhaust need to be wide open. Leave firebox door open until the sticks catch fire otherwise they will smolder.
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Close door when sticks light. If your fire looks like this then it's burning clean. You won't see much smoke come from the stack. You'll need to add more sticks every 45min-1hr. I only use the lump when I first fire up the smoker. 100% wood after that. And just keep all your dampers open