medical assistant is a low paying very generic job, it is for the most part a medical secretary, that is overpopulated with applicants in most larger cities.
there is little advancement opportunity in the position.
an LPN is a career that is in high demand and if you enjoy nursing it is possible to bridge to an ADN,RN while already working. once you are an RN you can do another bridge and get your BSN which opens up even more opportunities for you. ideally it would be great if you could just go to a university and get your BSN,RN but that is expensive and time consuming and by doing it in steps you can work as you go and not end up in un-payable debt for your education.
go the route that is best for you but if you need to keep expenses down and are willing to spend a little longer getting to your eventual goal then get in the LPN program, don't waste your time and assets on the MA position.
my wife is an RN who was an LPN before bridging to the ADN,RN.
her employer paid all expenses involved in bridging from an LPN to the ADN,RN.