There is nothing to worry about here. It's just scientists trying to explain the solar system as it is now. The major planets orbits are tilted on average by 6 degrees with respect to the sun's equator. It’s a long standing puzzle in astronomy, why did this happen?

See this Space.com article which goes into more detail:

"One alternative is that electrically charged particles influenced by the young sun's magnetic field could have interacted with the disk of gas and dust that gave rise to the planets in ways that tilted the solar system. Another possibility is that there might have been an imbalance in the mass of the nascent sun's core."

Did the Mysterious 'Planet Nine' Tilt the Solar System?

So it is just an extra theory to explain this. It’s got the advantage that if we find planet nine then we can do modeling and test if it did actually tilt our solar system.

But it is no problem for us. We already live in a tilted solar system. Just as we live on an Earth with a tilted axis which causes the seasons.

Also since you mention Nibiru you are probably thinking of the idea they promulgate that the Earth’s poles are shifting or have shifted. This is nonsense ,as is easy to check for yourself.

The solar system’s tilt isn’t changing noticeably. If Planet 9 has an effect it is very very slow and gradual. This is a new theory to explain existing observations, not new observations.

And Earths axis is not shifting either. Except the very slow precession which gradually changes the pole star in a 52,000 year circle around the night sky. You can go out any starry night, and if you live in the northern hemisphere, locate the pole star as with the flag of alaska:

Now go out again a few hours later the same night. You will see that all the stars have changed position except the pole star. It remains in the same position in the sky relative to you, and you can use it to find due North.

This shows that our Earth’s axis still points towards the pole star as it has for centuries.

There hasn’t been any pole shift, and the solar system is not changing its tilt either. It just is tilted and has been tilted for billions of years, and the Earth’s axis is tilted and has been for billions of years also.

There is such a thing as magnetic pole shift, the direction of magnetic north changes all the time, but this is not a danger to us - there have been magnetic reversals even since modern humans arose, and we are still here, not even any known extinctions due to magnetic reversals.

There is also such a thing as true polar wander, the Earth’s pole shifts by centimeters due to shifting of the positions of continents on the Earth’s crust and such like. This is of no concern at all and does not have any noticeable effects on positions of the sun or the stars in the sky.

I hope this helps.