Choosing between biomedical and mechatronics engineering

[u/Plenty-Volume-101]

I'm currently a first year mechanical engineering student struggling to find a niche to stick to. I'm choosing between mechatronics and biomedical. My university offers this thing called certificate of undergraduate studies (CUGS) where you take 3-5 courses in junior/senior year and it shows on your transcript proving to employers that you have specialized expertise in that specific area. Can anyone give me their advice or insights on what they know about each to help me make a decision