Well first off you need to get yourself a FAA certificate before you can fly N reg.
You can either get a full unrestricted FAA certificate or get a FAA 61.75 that is issued on the strength of your EASA license and will carry all the restrictions of the EASA license.
Once you have that sorted - then you can investigate somewhere to hour build.
You do not want to go to one of the large flying schools where you will pay.. Better off finding a small location where you can simply hire.
You will need to undertake a Flight Review to "commence the clock" on a 61.75 issued cert.
So you need to read up on the FAA regs in the FAR/AIM.