The Mastodon instance run by @digitalcourage has a maximum toot length of 1024, and the NGO that runs it actively encourages journalists to join the fediverse.
An account costs 1€/month. Most of the local toots are in German, but most users read English, too.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!