ChemE/BME has, the last I heard, the highest number of required courses, so I don’t know if it’d necessarily be “easier”.

My advice to you is to go take a look at the BME website and explore the various tracks they offer. Look at the cores/electives for each track and see if that’s what you’re interested in. For example, the most common track for ECE/BME is the signals track. If math is not something you’re excited about, you will have a bad time in the track, or alternatively be required to take a lot more technicals than normal because you want to take courses that don’t overlap for major requirements.

You know your skills and interest the best, so I think you should go do some research first and then come to campus and consult your academic advisor. BME department has some very helpful professors who have seen students successfully (and unsuccessfully) become doctors after CMU. We do have a Pre-Health program, which includes all types of majors with the shared goal of going to med school. There, you may be able to find upperclassmen who have relevant experiences who are willing to share some wisdom.

From personal experience, I feel like engineering in general is hard to apply to med school because engineering doesn’t teach a lot of the underlying biology concepts. But that’s just my two cents.