My grandfather is a Church of Christ elder (their equivalent of a Bishop/Pastor, for lack of a better word) and my mom was raised Church of Christ, obviously. I was exposed to it a lot growing up. In short: not very much. One thing I noticed with Church of Christ is that the OT is mentioned insofar as wrapping up a sermon. Like, if there is a sermon on why being gay is bad, they'll pull from Leviticus, which is cool, but that's the extent of it, really. I remember my granddad hosting Bible study about Job once, but beyond Sunday school they didn't talk about the OT much, and almost never in terms of theology. I've heard homilies and sermons from other denominations that go into how there was buildup to the coming of Christ in the OT, and how understanding the OT can help us understand the NT and the coming of Christ, but that was never talked about in the Church of Christ my grandfather runs. Then again, I've only been to about 70 or so sermons there, since my mom left Church of Christ and we only went for big holidays when visiting family.