Hello, if you are a beginner, you will most likely want to start by investing in cryptocurrencies and basic trading with a broker like Coinbase or a spot trading platform like Binance. From here, you can move on to speculating with more complex financial instruments such as futures, options, prediction markets, and leveraged tokens. For a simple cryptocurrency exchange, you can use the service at https://crypocto.com/, this is the easiest and safest way to exchange cryptocurrencies.