After Tezos Babylon upgrade there is no need to create a KT-address to delegate your funds to a baker. You can delegate funds directly from your tz-address. You can delegate only all your funds from that tz-address and only to one baker.
However, you can use one mnemonic (seed) phrase to creating an HD Wallet and create any number of addresses and delegate to different bakers. You can make transfers after you have delegated funds at any time. Delegated funds are not frozen on your Tezos wallets.
So, to delegate you need to deposit your wallet and select a baker (delegation service) for it. Please read the step-by-step guide below.
Atomex is a wallet developed by Baking Bad team. Windows version is currently available. You can download it here.
Login to your Atomex wallet. To create a wallet, check out our tutorial on GitHub. Press "Wallets", select "Tezos" and press "Delegate".
Fill in the delegate address or select from the list provided by Baking Bad. Select the TZ-address from which you want to delegate. Check “Use default fee”. Check the correctness, click "Delegate".
Check the correctness of data on the Delegation confirmation page and press "Delegate". It takes around 1-2 minutes for the transaction to be processed by blockchain.
Press the "Update" button. After that, you will see the delegation in the window. The end.