FTL drive can be built along current scientific theories or your own. For some real scientific drives that allow you to travel faster then light, there is the Alcuberrie drive, the warp drive from Star Trek, which has some validity in a couple of published papers, and wormhole discovery/manipulation/creation of dark matter acting as the main force for concentrating or lessening gravity. Also, realize that the less mass you have for a ship or object traveling at light speed, the faster light speed becomes.
As for wormhole travel, for most classic SF work, you're limited to point to point travel. However, you may also discover that Wormhole A can connect to wormhole B and C, but B doesn't connect to C, nor B to C. Constructed wormholes are usually created by a new handwavium element built on a ship, a fixed location (IE wormhole gates), or even an external series of acceleration rings shot out from a ship and arrayed in a specific pattern.
For normal FTL, you also have to decide if it is real-time or dimensional suspension. Is it instantaneous? Does it cause the crew to have massive disruptions like jump sickness, turning the crew members into werewolves, that sort of thing? As for FTL communication and sensors, for maps involving the PC's ship via light speed sensors onlyis pretty easy if you create a short size limit for the point at which FTL can be used. If you go jump gates or alternate dimension, does the FTL medium allow for ship combat and communication ala B5, or is the ship impervious to all forms of attack while in FTL mode?
Magic FTL drives are some of the more interesting, because in Dragonstar, they use teleport drives to go around the laws of physics, or jump your ship into the astral plane where time doesn't pass and allows you to travel far more quickly then with normal sub-light travel.