January was a mess, but I'd still like to pursue some of my tech re-training goals for 2023. What do you think would be a rewarding course of hobby study (aiming for 50 hours a month) that might also improve my insight into key topics for the tech-driven world ahead? (I know the languages might seem simple, but there's a great Python podcast that talks about how the language is used in a range of unexpected fields, so I'd be looking at applications, too. And Ruby's just fun.)

Thanks in advance!