Transfer qualms

I am an ORM freshman just finishing his first semester well arleady finished lol. i get 4.0 gpa. I think i can maintain this or high 3.9 for all of college. I reaallly am interested in transferring into a top 20, particularly and ivy or JHU. I have good ACT score and good subject test scores. now i know the cons of transferring such as finding new social circle, and stuff like that. however i have a question that isnt asked as much. if i transfer to one of these schools? how much would i have to start over? i want to get into med school as quick as possible and not waste time. so i plan on doing all the pre reqs except biochem at the well regarded state school i am at. so if i get into lets say wash u or jhu, i would be a junior and everything will be cool no have to repeat any pre reqs right?

thanks

I also would like to attend a top 20 medical school and will be dedicated in my college years for this pursuit, which might make transferring more worth it

How much you would have to “start over” depends entirely on the school. You need to look at the major you would be transferring into, see what the required university core & major core classes are, and see how your classes line up with them. Also, good schools generally have a maximum number of units allowed to transfer over that is around half of the total units required to graduate (sometimes less than half)