How can I tell whether mechanical engineering or electrical engineering suits me better?

First consider whether you are interested in the mathematics and physics used in both fields and willing to solve problems through trial and error. Mechanical engineering tends to focus on forces, motion, materials, design, and manufacturing, while electrical and electronic engineering tends to focus on circuits, electromagnetism, signals, semiconductors, communications, embedded systems, and control. Try introductory classes, making projects, or programming, then compare each department’s curriculum and laboratory work to see which topics you would want to keep studying.