Hello, If you're new, you'll likely want to start with cryptocurrency investing 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 exchange of cryptocurrencies, you can use the service at
https://crypocto.com/wallet/dai, this is the simplest and safest for exchanging cryptocurrencies.