Eighth grade may well be important to 9th grade, but in the whole scheme of things, it's certainly not a show stopper. If you want my advice at getting a nice job, here is the fool-proof plan:
1. Take computer science classes -- as many as your school offers
2. Learn Java, PHP, HTML, CSS, Javascript (in that order of importance)
3. Go to college for computer science, and make at least a 3.0 GPA
4. Make sure you continue to learn about new technologies -- you won't be in the job market for at least nine years, and a lot can change in that time.
I know a lot of people just exiting college, and those without Computer Science degrees are struggling to find work. Those who graduated in Computer Science received internships during and immediately after school, and are usually offered full time jobs basically instantly.
Computer science is the only continuously, constantly expanding industry, and there is always room for growth. If you go to school for art, theater, architecture, finance, law, or anything else, prepare for a long job hunt.
*disclaimer* Make sure you like what you do. That's important.