So my question might be a bit newbish but do you need besides tether in your wallet also ether for paying gas, or in other words you need two?
Yes, you need to prepare some amount of ETH to pay the fees in your transaction. Basically it's not only applied for Tether or stablecoins but for all kind of tokens that running on ethereum blockchain, you can use
ETH Gas Station to track the current gas prices on the network.