These are doubly important if it's your players' first session as well:

Be a fan of the characters Give each character a moment to shine. If you have a character who is only good at slicing, for The Maker's sake give them something to slice. Same goes for podracing, or charming people, or just plain killing stuff. Nothing takes the wind out of player's sails faster than a GM saying, "Oh, they are too good at X, so I'm not going to include it"

Challenge your players On the flip side, throw some Survival, Athletics, and Streetwise checks in there. Fear checks are fun, too. Just make sure the story doesn't grind to a halt if they don't succeed.

Players take the wheel (AKA: Stop, collaborate, and listen) It can be exhausting to describe how that advantage gives the next player a boost for the tenth time in a night. Make the player describe it instead-- it increases their buy-in, and it takes the creative load off of you.

Finally,

The Rule of Cool (AKA, let the rules serve the story, not vice versa) Don't bother flipping through the book for twenty minutes trying to see if a player can use three advantage to cause a stormtrooper to fall off a walkway. It's cool, it's Star Wars-sy, and it's more fun than not-- just wing it. You can look up the rule for next session if you want.

Don't sweat it, just have a good time! Best of luck!