Bridgy Fed is pretty straightforward. You just follow the account and away you go.

It doesn't make your bridged posts particularly attractive-looking (essentially you appear as a bot under a subdomain of a server), but it's searchable and discoverable in the target network.

I'm now mostly using Blue Sky, but I bridge to Mastodon, so all my posts form part of the content that's available to fediverse users. For little old me that's not all that important, but if every big organisation or journalist or celeb did that too, that'd do a lot to build vitality into the fediverse network.