Starboard tack is when you are sailing with the wind comming over the right hand side of the board.
When we say we sail starboard tack it means we have the wind comming over the right hand side when we are going out.
For us to help more we need to know your weight and what boards and sails you are using at the moment. Also age will help as if you are young it is better not to get to tachnical.
When trainig there are so many ways to do it. You can try and learn just a specific maneuver or you can learn a simpler one first to build up to it.
Windsurfing is the best training for windsurfing but all balance sports help a lot. Skate boarding, Trick skiing, Freestyle snowboarding, BMX, anything where you can do rotations.