1) After an initial surprise attack (if there is one), add together your character’s Dexterity and Wits attributes to determine your base initiative (taking any wound penalties into account), then
2) Use the Dice Roller to add 1d10 to the roll, then
3) Declare your action and weapon, and use the Dice Roller to roll the appropriate dice (if necessary).
At this point,
4) The scene will then be on hold pending a summary of the combat round from the Storyteller (assessing damage etc.,) who will inform you when the next round is, and also the order of initiative (please post in order of your initiative for subsequent rounds).