Agree on DataCamp, but unfortunately most mobile options feel kinda shallow for work... grab Udemy AI for Everyone by Andrew Ng for $12.

• Sololearn AI Python Pro Cheaper than monthly subs.

tl;dr: DataCamp Mobile Learning for Data Science and AI is probably your best bet for that 30-minute window on the L. It bridges the gap between clicking buttons and actual coding without the Coursera burnout. Honestly, if Coursera feels like a slog and Brilliant is too much like a game, you should check out the DataCamp Mobile Learning for Data Science and AI subscription. I used it for a few months when I was trying to brush up on transformer architectures and vector math while riding the train, and it actually stuck. It usually runs about $25 a month so it hits your budget perfectly. The reason this works for your situation is the way they structure their AI Fundamentals track. You arent just watching videos or clicking random buttons... you actually type out snippets of code and logic on your phone. Its basically active recall optimized for mobile. For talking to devs, you need to understand the difference between supervised learning, weights, and biases, and their app covers the technical side without the 40-minute lectures that kill your vibe. One thing tho, the mobile app is a bit lighter than the desktop version, but for a December deadline, itll get the core concepts into your brain fast. Ngl, it helped me grasp how gradient descent actually functions under the hood before I had to lead a project meeting. If you get stuck, the hints explain the logic instead of just handing you the answer. Lmk if you need help picking a specific module to start with.

Finally someone says it. Ive been thinking this for a while but wasnt sure.

Can confirm this works. Did the same thing on mine and its been solid ever since.

^ This. Also, in my experience, the mobile-first brands always beat the converted desktop ones for commute learning. I've tried many over the years and the UI usually makes or breaks it. Though speaking of the L, man, commuting in Chicago is its own beast. I used to take the Blue Line every day and there was this one guy who always brought a whole bucket of fried chicken and would just offer drumsticks to everyone in the car. It smelled amazing but also made my phone screen super greasy because I couldn't say no to free Harolds. I ended up dropping my phone between the seats once and almost lost my entire progress on a python course... anyway lol sorry kinda went off topic there.