Having issues pulling a decent shot with the Breville Bambino + Fellow Opus

I just started last week with the Breville Bambino with the Fellow Opus. Last week, I managed to pull a shot at around the 3 grind setting on the Opus. It seemed to extract a bit too fast, so I set the grind setting to lower the next day and it was basically choking. I went back up in setting and it choked again.

Today, I tested it out by starting at grind setting 1. Choked. Grind setting 1.5, choked. Grind setting 2, choked. Grind setting 3, choked. I upped it to grind setting 5 and there was finally a bit of flow but not much, I think I got about 10-15 grams.

I'm really confused on what I'm doing wrong as Fellow is telling me that I should be in the 1-2 grind setting for espresso and rarely up to 3, but I'm not pulling any decent shots up to 4. I was only able to get 2 decent shots at around 3 - 3.5 and never again. I'm using the single walled basket that the machine comes with, the Normcore V4 tamper, and the Normcore WDT Distribution Tool.

I'm using 18 grams of the Devocion Honey beans every time.