In order for people to better help you, you might want to let people know the answers to questions like:
-Which specialty are you aiming for (e.g., IM -- are you also aiming for hem/onc eventually)?
-Are you a US MD, DO, IMG, US-IMG?
-Did you already try to match last year?
-What are your USMLE Step 1/2 scores?
-Do you already have some research or other degrees (e.g., PhD)?
-Etc.
For example, if you are an IMG hoping to match into IM, then you could try to do research for the Dept of IM at a place that accepts a lot of IMGs and a place where you can get to know the PD, aPDs, and others who can help you. However, if you have already finished your IM residency, and are trying to match into hem/onc, then it would be good to get to know hem/onc PDs and others who can write you a strong LOR and whom you can publish research with so researching at a cancer center might make sense.