Should I take 18 credit hours my very first semester?

Hello, I’m going to be pursuing a Mechanical Engineering degree in college. I’m a determined student and am an all A student. I got a full ride to my university so I just wanted to know if 18 hours my first semester would hinder me or would be a wise decision.
The classes I’m taking include
Calculus 1
Physics with a lab
General Psychology
Intro to C++ (Programming)
All comments would be very helpful.