Make Java IDE your friend - it's the only way to get good at programming. Once you are comfortable with the syntax, start looking into OOP coding conventions and other OOP languages which will prepare you for post-secondary (python, C++)
If you have Ms. Chang as a math teacher you are beyond blessed. She explains the concepts very well, and as long as you take the time to review and practice, you will do well. It is a very supportive environment. As a chemistry teacher, keep in mind that your experience will be slightly different. As you are doing many labs (which is amazing compared to other schools! ) it is more important that you know exactly what you are doing. She will expect a lot from you because in science, the consequences of being unprepared can be serious (especially in labs).