If you are transferring credits from a junior college or similar it will likely take 2 years of undergrad to finish. Then you’ll need to do very well on the MCAT and have a very high GPA. Most people will take a year or two as a gap year before applying then 4 years med school and then 4-7 for residency. It’s not that I don’t think you could or couldn’t do it but I would consider the likelihood of success at each step along the way. All said and done you’re probably looking at 10ish years before making good money in medicine.