hi, i have a quick question about ~plane of existence~ so that i don't heck something up

a bunch of d&d spells involve what's termed the "ethereal plane", which (from my quick googling) is like taking one step sideways from the material plane. the person in the ethereal plane can still see what's happening in the material plane, they're just intangible/invisible to everyone else. if they move while in the ethereal plane, they'll reappear in the equivalent place in the material plane

would that be okay to keep as is? i figure since it's not dimension hopping it isn't game-breaking, but didn't want to assume!