Right click and search them for the cards you want to use for your fleet. Go back to the brown bag and drag each category of cards out of it. Don't click the buttons on the card itself yet, but if you do you get the ship model and the defense tokens appearing. Drag out the card you want to use to the table/mat area. Drag one category, such as 'Rebel Ships' out of the search window and onto the mat. If you right-click the brown bag, and choose 'search' you find some categories of cards. A brown bag will appear where you drop it. Find the one labelled 'All Cards' and drag it somewhere convenient.
You find these in small blue bags on the left side of the mat.
So, to make a fleet, you need the ship cards and upgrade cards.
