Just got a Breville Express (I love your red color machine!)  and it took a few tries to get a good vanilla latte. Learning to use the froth steam wand makes a big difference (I need more practice). I would add to your video a step to swirl the froth to reincorporate some of the floating top foam into the milk below while still in the milk jug.

This machine adjusts the grind size both with the side dial and an additional top burr adjustment in the grinder. I hear these settings can change based on the coffee beans used. I ended up on 5 on the side grind size, and the internal top burr is set to 6. I was able to get good pressure and a good taste.

Cheers from one Skillshare instructor to another!