Hi, hope your first brew's going well, what beer did you make?
For priming, I make up a sugar solution and use a Calpol syringe to get the correct measure into each bottle. Saves stirring up the trub at the bottom of the FV and also ensures each bottle gets the same. Plenty of people add it to the FV though, either way I'd ensure it was a sugar solution.
Most of us have learnt by trial and error and use whatever works for us.