I don't know who would pay for data sciencing at the level that you probably want outside finance except possibly some of the AI outfits in a hurry, maybe even relatively new ones but flush with cash...
For sure if money would be the only metric, I should try to stick to trading. Even if my stuff doesn't work, I could try to join some prop trading shop. Could imagine doing so to be honest, but right now just want to try something new.
Consider doing a DS-flavoured degree, eg at Master's level, part-time? Maybe do something more mundane part time to pay for it?