Newbie here... Any advice welcome! [B Bambino, Baratza ESP, Big Bang basket]

I'm about a month into this, and finally have gone fine enough that I'm pulling what I think is a decent shot. It's not the sexiest one I've pulled but the time is closer to "ideal". My palate isn't too refine to lean on "taste is king" so I'm relying more on numbers.

How does this look to y'all? Video starts at 0 (when I hit the button), seems like maybe around 14 seconds pre-infusion. Are there any grossly amateur mistakes you see?