Forecasting tournaments: https://www.metaculus.com/ https://www.infer-pub.com/

Forecasting your own life: https://fatebook.io/

Training your calibration: https://programs.clearerthinking.org/calibrate_your_judgment... https://www.quantifiedintuitions.org/calibration

Books to read: Superforecasting, Scout Mindset

Read Superforecasters. Look at the two linked-from-article forecasting sites. Look up Adam Braff's blog - he runs an annual forecasting contest. Enter prediction markets. Read up about Brier scores. Try, fail, try and learn.

Most superforecasters are retired academics or quants. I wouldn't recommend the investment in time that it would require.

Good Judgment Open, Metaculus

Kalshi, Metaculus.