Need advice on Tech

With AI improving we see it is quite capable of writing decent codes, how can someone new to tech decide on what to pick up? Frontend or Backend or both. Nowadays they say Full stack developers are in demand but shouldn't one be good at at least one thing and have knowledge about other things? How to prioritise what to learn. There are just so many things that I'm a bit confused as to what to learn and focus on. I'd like to seek advice from a future perspective, and any predictions on how the tech industry might shape up.