since you already have a BS, you should consider an accelerated BSN program. They are usually 1 to 1 and a half year long. There are also entry level masters of science in nursing (ELMSN) programs, which is typically 2 -3 years long. Good thing about ELMSN is that after a year, you can sit for the boards to get your RN license, and depending on the specialty you choose, you may take another year or two to finish the masters portion. So after 2-3 years of starting the program, you can get a RN license, MSN, and also a certificate for your specialty. 3 in 1!!! some ELMSN programs also give BSN after finishing the prelicensure portion of the program. so that makes it 4 in 1!!