You can change your feed from "All follows" to "Global" on the top navigation bar. Then you should see every note posted on every rellay you're connected to. That's a way to find new people to follow.

Another way to fill your feed in Amethyst is following tags. Again on the top navigation menu, usethe search tool to find a tag of something you are interested on. Common ones are #nostr, #plebchain, #coffeechain, #grownostr, #bitcoin... There's many more, just see what people are using in global and follow those you find interesting.

That should start populating your feed. Just remember, there's no algorithm here. Instead, you need to put the work and create a rich feed by picking in and filtering out stuff. Visit global regularly to keep building your feed, and unfollow, block accounts that you find uninteresting/annoying.

Welcome to the free side!