Cryptocurrency Basics | What exactly are gas fees?
Transaction fees are roughly equal to the amount of Gas used × the Gas price. Gas prices are generally expressed in Gwei.
Charging for every computational step helps prevent malicious programs from hogging the network with operations such as infinite loops.
$ETH is the native coin used to pay Gas fees on the Ethereum mainnet. Current price: 2363.45.
If you don't understand a product, it's best to steer clear. Practicing with small amounts is a safer approach.

Prices can fluctuate significantly, so manage your leverage carefully.