Mission Question

[MacTavish]

I started playing this afternoon and am in Charlesfort. I started my very first mission. And like the N00b that i am I had not visited the swashbucbling skills instructer. I died and left the instance. I then trained on one skill. How does one restart the instance? I have tried talking to the mentor. I tried the door to the nobles house. Both to no avail. Help would be greatly appreciated.