There is always frequent mention of Kenpom on this site, with good reason. But this is a pay site and much is off limits.
If you want something for free, try this:
https://www.teamrankings.com/ncaa-basketball/ranking/predictive-by-other/
A lot of the same things, but much less is behind the paywall. I have followed this site for 10 years or so, and I recommend it.