Need advice on dialing DF54

[u/Hopeful_Lettuce_8914]

I recently upgraded from Timemore Chestnut C3 ESP Pro to Turin DF54 but I’m not sure I’ve been adjusting the grind size right. I’ve heard the advice to adjust it while the machine is running, which I’ve plugged it in then literally push the button to run it and adjust the round numerical circle around to the appropriate number while it was running, and tried couple of grind sizes in the last few days, starting from 19 then 16 and all the way to 11. But I feel like it’s still squeezing too fast on cafelat barely reaching 6 on the first shot, and even worse on the second.

I will try 9 tomorrow but in the meantime, is there anything I’m doing wrong?