The FTU does have a program to start prepping FAIPS to be aircraft commanders. You won't graduate the FTU as an aircraft commander, but you will get more exposure to briefing, AC decision making, and mission leadership. If a student does well in the program, we make a recommendation to the operational unit to accelerate their upgrade to AC. Does the ops unit take that recommendation? It depends on that student's performance in MQT, the leadership that student shows in ground-related duties, and what kind of timing or back log there is in the AC upgrade program already (immediately following a deployment, for example, there is probably a sizeable group of people ready for AC upgrade).
In short, the timeline can be shortened, especially if you can show that you have tactical and systems knowledge, are willing to work hard, and you are generally an asset to the squadron.