To become an lpn you can go to a vocationnal or trade school. Any prereqs they require they usually let you do concurrently while in the program. Most programs are about 9 months but never more than a year. To become an RN afterwardswill require another year of schooling at a university or community college. My advice to you would be to just go straight to RN because from my interactions with many nurses LPN do almost everything an RN does but gets paid a whole lot less. Also after the first year of the RN program you technically can take the test to be an LPN.