Go to Discord and make a new server that'll be dedicated to your webhooks.
Step 2: Create a channel
Make a new channel or use the default "general" one.
Step 3: Create a new webhook
Click gear icon next to your channel (Edit channel) and go to "Integrations", then click "Create Webhook", you can now click "Captain Hook" or "Spidey Bot" whatever the name is and click "Copy Webhook URL" to grab your link.