If you listen to podcasts, I like and use Fountain.fm almost every day. (Also as a bonus it's a nice way to get people to use Nostr without even realizing it, if they listen to podcasts)

w3schools.com also has free tutorials for most of those languages. I think one of the good ways to learn is to pick a simple project you find interesting, and try to implement it. You will end up having to look up how to do things, and try to understand why. (E.g. a simple counter that goes up every ten minutes. Next you might want to improve it, change how it's displayed. Add checking with a network clock (NTP). Etc.) Break everything down to its basic elements, start small, you can add to it once you get the basic building blocks.

Was it a used Pixel 9? Is there another computer you can test it with, to make sure it's not the port on the phone?

Here's one I know of. You have to be playing the podcast to turn on the video. https://fountain.fm/episode/G3PlJ76NeH6kaDBFVP46 Learned about from this post: https://njump.me/

Did you try playing it, and then clicking the hamburger menu while it's playing?

Works on my Android, installed from Google Play Store. Zapstore says I'm on version 1.2.14

B) SeedSigner Open source and off the shelf components. Who knows what the world will look like in 10 years, so if it's the ONLY one, I'd want to be able to repair or replace it, discreetly if necessary, without depending on a company still being around.