* Your academic background: How well did you do in similar subjects in high school or previous college coursework? Strong preparation in math and science will make it easier.
* Your learning style and habits: Are you a highly organized and efficient student? Do you seek help when you need it? Effective study habits are crucial.
* The difficulty of the specific courses: The rigor of calculus, chemistry, and biology varies significantly between institutions and instructors. Check course descriptions and reviews if possible. The elective could also add to the workload.
* Your time management skills: Can you realistically dedicate the necessary time to each subject while maintaining a healthy work-life balance? Overcommitting leads to burnout.
Generally speaking, five college-level courses in one semester is a *heavy* workload. It's manageable for some, overwhelming for others. If you have any doubts, it's better to err on the side of caution and consider a slightly lighter course load your first semester. You can always add more courses later if you find you have the capacity. Starting strong and building a solid foundation is more important than trying to take on too much too soon.
Talk to your academic advisor. They can help you assess your readiness and make a course plan that suits your abilities and goals.