u/Emergency-Brain4262

There’s this programme where I really want to rotate at and hopefully match but I have no connections whatsoever to that programme. I did find APDs linkdin but that’s about it. Should I reach out to him there for an observership ? Should I walk in ? I feel a little strange doing that since I don’t want to cross the professional boundary.
Also if I do walk in, who should I meet and where should I ideally go ?