No one is going to feed you content. It's a different way to think and consume media. You just gotta start following people or hashtags and see which content and people are posting things that interest you. Go the the local feed of the instance of the world feed and watch things unfold.
But you gotta bootstrap it. There's a lot of interesting people and content in it.
There's a few sites that help with discovery by listing relevant people and topics.
There's hashtags important to follow at the start, for example #fediverseMigration where lots of posts trying to help new people and guiding them appear.
I know it may hurt a little at the beginning, but it's so worth it and rewarding. So, don't quit and give it a little bit to grow on you. It's a new experience so not everything will feel similar to what one knows previously.
And, the amazing thing that on mastodon one being able to directly interact and comment on lemmy posts is just mind-blowing.
So. Good luck. And Thanks for all the fish.