To find people to follow on Pixelfed, you can use most of the same techniques and directories that Mastodon etc. users use.
Pixelfed is not just about Pixelfed accounts! You can also follow non-Pixelfed accounts from elsewhere on the Fediverse like Mastodon etc. To follow a non-Pixelfed account, paste its Fediverse address into the search box within Pixelfed. The account’s profile will then appear in the search results and you can click Follow to follow it.
After you follow them, non-Pixelfed posts will start appearing in your timeline but they will look just like Pixelfed posts, and you can interact with them in exactly the same way. The process is so seamless you probably won’t notice they’re from another type of server.
By default, Pixelfed only shows posts that include an attached image. If you want to see text-only posts as well, log into your Pixelfed account and go to Settings > Timelines > Show text-only posts, tick the box and click Submit.