Longevity concerns
Personally I wouldn't recommend starting out now with much expectation, treat it as a hobby and see where it takes you. I don't like to be negative but I've been trading since 2007 and have had to evolve year and year and whilst returns have remained high I am expecting quite a drop off in the foreseeable future. There was a time when I would trade Tennis, F1, Snooker, Rugby Union+League, Golf, NBA, NFL, Darts and other stuff like Eurovision very profitably, since around Covid time inplay liquidity (or should i say non-smart) liquidity has gone off a cliff. Now i'm 95% Cricket which has been growing and there's plenty of liquidity for a position taker but other strategies have been squeezed