IG is like twitter in that the more effort you put in to curate the people you follow, the more rewarding your timeline is. I never look at Explore, but I look at the pictures in my own timeline and enjoy them.
The thing that Twitter most needs is some way to find and sort by topic or category. And I haven't been able to find any resource to help me find accounts like the ones I most enjoy. You'd think, with all this machine learning that's supposedly going on, someone would find a way to lead me to the people I would enjoy reading, based on some "seed" accounts.
I'm on about my 12th account, and I barely pay any attention to it, because it's just too much work to put what I'm reading into context, and then switch it 72 times to catch up my feed. And I follow less than 200 accounts! God help the poor souls who have thousands of follows.
I say all that to ask: Do you know any way to find accounts with high signal-to-noise ratios that might align with other, known accounts? If Twitter wants more "engagement," THEY ought to be the ones offering tools like this.
Just follow a small set of people. When those people retweet interesting stuff from other people, follow them too.