I start my fatemastering 2 weeks ago. Nothing to say about sixteen tonns, but can give you a few tips about starting.
1. Prepare some side quests, small ones. If your players will not go through story. And prepare some tricks to return them back on the storyline.
2. Fill up the one shot more. Add some more FM even if they just a crowd, objects and equipment they can found. One shot give you a story, but its not filled enough.
3. Try not to say No to players. If the want to do something - let them do it. But if it's not good for story make their dids pointless or too complicated to success.
4. And in general - be ready for unexpected moves from players. They usually not do what you expect)))
As for me, I made a 3 session. Starting from the corebook, one shot Bad Blood and one my own.
I hope its will useful.