Preferring to avoid the social and emotional dimensions of a question like this one, I’ll instead take the hike, drop back and punt the question over to science.

Science doesn’t exactly know what time is, but it has a direction, and that direction isn’t backward. You can accelerate yourself forward several different ways — special relativity offers one solution, deep-freezing yourself offers another, at least plausibly. But going back? Nope. There’s no plausible way to do that. You can change the rate at which you travel forward relative to other things or persons. But that’s it. There’s no going back.

Hence there’s no reason to agonize over the conceptual paradoxes which arise from fictional backward time travel, or worry about what your older self would tell your younger self. It ain’t happening. Certain sorts of paradoxes are forbidden by the natural laws which govern the universe.

In college we had a term for hair-on-fire conversations which had no connection to the real world: bullshitting. Fun, but useless, except as a way to pass time. Going, of course, in the only direction we can go: forward.