Overshooting temp with blower - help needed

So, I’m using a Weber Kamado and I’m pretty sure I’ve added too much charcoal to start, I had about 1/4 of a Weber Chimney, and a few wood chunks, but it’s been locked at 263 (closed lower vent, sliver on top damper) when I set it at 225. The fan is at 0% so the blower seems to be working by not working.

How much charcoal or wood are you all using to start your smokes?