I don't know why this point isn't raised more. So Christianity presents the resurrection of Jesus as a key detail. However, that never actually happens in the Bible. Reread those gospels if you want, but the only one who gets a resurrection in the Bible is Lazarus (unless there are a few more I'm not aware of).
TLDR before I get into it, but we can agree resurrection means coming back to life after dying, and by life we mean this life not the afterlife. Jesus dies, then goes to hell (in the afterlife), then goes to heaven (in the afterlife). That's it. Both of those places means he stayed dead, not alive. "Alive in heaven" doesn't mean anything. If you're alive in the afterlife it's either not the afterlife or you're not dead. No actions taken in the afterlife mean anything. If Walter Mondale won the presidency of the United States in the afterlife, that still means Walter Mondale never won the presidency and isn't president.
My understanding is the Old Testament doesn't mention an afterlife at all because the concept of an afterlife didn't exist in Judaism until it was borrowed from Zoroastrianism. The Jesus resurrection story largely exists as a way to popularize the idea of an afterlife. This was a new idea and the idea that there's an existence without the need of your body wouldn't have made much sense. So Jesus' body physically disappears to heaven. This also takes care of the other major problem. If there ever was a real Jesus with followers, then where's his tomb/shrine? The idea of making Jesus a real person needed an explanation for why there'd never been any tomb or monument.
At the end of the day the Jesus story isn't a resurrection story, it's a missing corpse story, plain and simple. That's the only thing of note that happens in the story (except the zombie part). Jesus' body disappears. And "this guy really existed but there's no body, not even an empty tomb as a shrine, because his body disappeared by a miracle and nobody thought it was worth marking" (later retconned to we knew where it was the whole time, along with all the pieces of the true cross) wouldn't have been very convincing at the time.
Everything after that is a ghost story. Plenty of appearances of Jesus' ghost are claimed, but not one of him still being alive, walking around, needing a place to sleep for the night, if he's actually alive. The story of Lazarus is a resurrection story because he then needed to keep eating, needed a place to sleep, and remained a person walking around like a living person.
The Jesus ghost stories are just that, ghost stories, about someone dead. When he appears to people he appears, not walks up from where he was before. Nor does he then walk away to do other living person stuff. Nobody travels with him to these appearances because there's no living person walking around on the surface of the Earth, just ghost stories. The biggest one, where he appears to his disciples, is no different. He appears, there's some magical trickery where no one recognizes him at first, then he "reveals" himself, and then he disappears. That's a ghost story. There isn't even an attempt in any of the stories to pass it off as Jesus was alive again. He didn't go anywhere after any of these visits because they're just ghost stories. Except for Ghostbusters you don't have details of where a ghost goes because it's a ghost story. Oh, and a vaporized body is really important to the Jesus ghost story too. Apparently he couldn't even be a ghost without that.
So it's as simple as this. In the Bible Jesus dies (and stays dead). He goes to various places and does various things in the afterlife (so, meaningless). His body is missing. Then he appears as a ghost (or in toast) to people on occasion for the rest of history. There's no resurrection in that story. It's a story about there being an afterlife, that was later reinterpreted to be a resurrection. And this isn't just some quibble about language. The story is about the afterlife, not living life here in reality.