Transferring out of t100 school

I’ve already seen millions of posts saying how dumb it is to attend school with an intent to transfer out after the first year. It is my only option at this point without taking out a shit ton of money in loans. I understand everyone keeps saying to R&R but that is not an option for me and I have to attend. Im just looking for advice from people who transferred after their first year and what did you do to ensure that you will have the best chanced transferring. Thank you!