It seems you are driving on boring highways in US, go around a bit. Like when u reach Utah go south east & head in to grand canyon or go east & though Denver then drop by pikes peak. On the way south stop by Ten Thousand Waves in Santa Fe & back west for Grand canyon & Vegas.
As for Ocean states, instead of I5 take 101 along the coast, even if you don't take 101 the whole way at least drive through the Red wood forest by north cali
PS: Most US roads are pretty easy? But since she is new, watch out for wet/snow section of the roads.