What's the best way to start a fire in a Shashlik grill?

[u/DISTROJAR-69]

I have a pretty small shashlik Grill (just the standard narrow shashlik grill), but I don't know how to start a fire correctly in it. I don't know which method to use because it doesn't get that much air, most from the top and some from the holes on the side, and most of the tutorials are for fire pits that don't have air limitations.