Hi OP. It is a little hard to "network" effectively for medical school admissions before receiving an interview. One of the easier ways to do this is to attend information sessions to learn about the medical programs that you are competitive for. Then you can use what you learned to emphasize why you are a good fit for the school at the interview. As we progress through the cycle, you can also mention you went to one of these sessions and what you learned/how you fit in by sending an LOI. The other effective way to network is to make a connection with a medical school faculty member who can vouch for you during the admissions cycle, but this would need to be initiated in advance of the interview cycle.