Well as a medical student, you are not prepared to handle all the calculus and differential equations math, physics, and engineering that is involved with electro-magnetics.
I would recommend that you partner up with someone who is and work together to make whatever projects you want. This way the electrical engineer with the electro-magnetics background can teach you some concepts.
However, you must find someone that is very experienced, not a student as a student has not real experience in design, just textbook knowledge.
Real world practical experience by years of experimenting, doing work, and following the advancements is a life long career and hard enough for an engineer, let alone for someone with a medical background.
Also bear in mind that medical devices are very difficult to certify and depending on your country can take years to have enough collateral to present to authorizing bodies, and especially if they are sold internationally.
The ISO standards for medical devices start with IEC 13485 and IEC 14971 and get tied together in IEC 60601-1-2 4th edition.
Meeting all of these SIMULTANEOUSLY is very difficult for a group of people let alone one person, so you need a lot of help and a lot of money since projects take years, not months.
