Dual enrollment

I’m in high school and want to dual enroll at my local community college because they are unhappy at me taking standard classes. I have an interest in the medical field and science (bio and chem), but am not set on a certain goal yet. Recently, my school offer us a chance to work with biotechnology equipment and we are studying about forensics science. Because my parents want me to take a biology class at the CC, I have 2 options: Introduction to biology/biotechnology. Which class should I take and why?Will having learn a bit about biotechnology in class help me in biotechnology in CC? Which one will be more fun? Thanks in advance.

Also, are class in college year-long, 1-2 semester long or does it depend? Do you get the same credit taking a 1 semester class as you do a year long class?