Start with the global feed and search for anything that interests you. Or don't search, just browse through. You may see lots you don't like, but some that you do.

When you seesomething of interest, look for hashtags that could get you more of it. Also, look at that person's posts to see what else they post.

If you want to make a game of it, Jack Spirko proposed the #grownostr initiative with a 90 day plan. A bunch of us who listen to his podcast are doing just that. I'm only one week in and already finding nostr so much more interesting than anywhere else.

If you want to learn more about grownostr plan check out: https://www.thesurvivalpodcast.com/grow-nostr