new bike/ used bike

for a starter like me who looking to purchase a faster bike in the future... would it be better to start with a used bike and then buy a new one after i learn how to ride? or should i just buy a new bike for myself??

I figured i would buy a used bike and get experience on it and when i have enough experience i will upgrade to a better new bike. My question is... like most riders i have talked to sat its better to work it out this way but im not sure... would i be saving $ by doing this?? if so.. how??