First off, you need to know that deleting your Telegram account is permanent, so make sure you're ready to say goodbye to your chats and data. You can't undo it, so think carefully before making the jump. It's like quitting a game you've invested hours in - it's tough, but sometimes necessary!
To begin, you'll need to go to the Telegram website and click on the "Delete Account" button - it's not as scary as it sounds, I promise! You'll be asked to enter your phone number to confirm your identity, so make sure you have it handy. This is like the final boss fight, and you need to be prepared!