What FPV stands for?
First Person View
What is the difference between Analog and Digital?
The main difference being that the Analog systems transmit raw analog data while a Digital system transmits digital data. (you may refer the picture below)
In short, racers are for sure going for analog and people who wants to take cinematic videos would opt for digital.
How far a FPV drone can go?
It's actually depends on the situation. If you add Crossfire transmitter, the user handbook mentioned it can go up to 25km+ range (analog only). Digital FPV drone can only go up to 2km.
How long a FPV drone can fly?
Average 3-4min, depends on your set up.
How much do I need to spend to start this hobby?
Chill boss, buy radio controller first then practice on simulator (recommended VelociDrone / Liftoff) and we will talk later :)
If you really want to know the price range by getting full set in brand new condition, it is about RM5,000++.