I am going on a trip in real life soon, and I dreamt of going to that trip with the same people, however it was actually across dimensions that were very similar to earth, and I sight saw along the way, seeing weird schools and cars. One dimension was only made 50 minutes ago and was still quite advanced.
Dreams about going on a trip often represent the journey and the changes that come with it. In this case, the dream may be reflecting your excitement and anticipation about the upcoming trip you are going on. The fact that you are going with the same people can suggest that you are looking forward to sharing the experience with them or that you feel a sense of comfort and familiarity with them.
However, the fact that the trip takes place across dimensions that are very similar to Earth indicates that you may be exploring new and different experiences that are outside of your usual routine. The strange and advanced schools and cars that you saw suggest that you may encounter unexpected and exciting opportunities along the way that you never anticipated.
Overall, this dream can be seen as a positive expression of your readiness and willingness to welcome new and exciting adventures in your life.