First up, you need have your email on your account. The World Assembly sends a confirmation email to your real life email to join. You can check to make sure your email is correct in Settings, right below where your National Banners are:

Now that your email is done, you can Apply to Join the World Assembly! Head over to the World Assembly's page here, or click on "World Assembly" at the side of your screen:

This is the World Assembly, where every nation gets to vote on new proposals! Click on "Apply to Join":

It should take you to a page that looks like this:

Go to your real life email, and inside you'll have a confirmation email from NationStates, confirming you've been accepted into the WA. Remember, this is your real life email, not telegrams on NationStates!

Click the link in the email to join the World Assembly!

All you need to do is click "Confirm: Join World Assembly" and there you go: welcome to the World Assembly!

Now you can endorse our Delegate! Click on their name Alesina to go to their nation page. Then scroll to the bottom and click "Endorse Alesina".
Endorsing Alesina gives you citizenship and helps our region become stronger and safer.

Please remember, you cannot have more than one WA Nation at a time! You can have as many non-WA Nations as you want, but only one can be in the WA. This isn’t an Aesica rule, it’s a NationStates game rule, so be careful!