From a solely pessimistic point of view, you’re right to be scared. This is a war between two nuclear powers and it can get real ugly in the worst case scenario.

But as long as it’s kept a strategic war focused on border bickerings and damaging each other’s economic ability, civilians should be safe in the most part.

I’d recommend channeling the fear into activism towards peace. If you are willing and able, get together with others and pressure your government with large protests against the war. If not, then stay safe.