Pixelfed is great to build portfolios, share images. but mastodon is still better solution to have dialogues between ourselves and others, and share each other's work.
That they federate is what makes this a superior solution to certain commercial alternatives. :)
Mastodon.ART — Follow friends and discover new ones. Publish anything you want & not just art of all types: links, pictures, text, video. All on a platform that is community-owned and ad-free.