Alternatives to Forex trading include stock trading, cryptocurrency trading, and commodities trading. Stock trading is much stricter in its regulations. It is much more challenging to get approved to use leverage and to get approval to sell stocks short. The stock market is also closed overnight and on weekends.
The commodities market is open for trading even less often. Commodities include goods like crude oil, natural gas, corn, and metals. Signing up for an account with a commodities broker is similar to signing up to trade Forex. You will need to provide various information to the broker, and if they feel you are an acceptable risk, they will give you an account.
Cryptocurrency trading is in its infancy. The utility of cryptocurrency is low and price changes are mostly driven by hype and market sentiment as opposed to fundamental or technical factors. Some in the financial community does not consider them investments.