The important thing is to link them to the “New” page, because the Active page doesn’t change that frequently.
Then if they are interested, show them how to sign up for an account at Lemmy World, how to join communities, how to block communities and how to comment and post.
To show them what Lemmy is, link them to https://lemmy.world/?dataType=Post&listingType=All&sort=New
The important thing is to link them to the “New” page, because the Active page doesn’t change that frequently.
Then if they are interested, show them how to sign up for an account at Lemmy World, how to join communities, how to block communities and how to comment and post.