Nobody gets out of high school and gets the job they want when they grow up. ;)
Your first job is going to suck. It’s going to be hard work. The pay and hours are not going to be great. You won’t be respected as an employee or often as a human being.
What it’s going to teach you are organizational skills. Show up on time. Do the best job you can do. Admit your mistakes and learn from them.
Carry what you learn there to the next job and the next job. Do better each time. Learn new skills. Find jobs that interest you.
If you can, go to college for a STEM degree, network with other people and employers, and when you get out of college, you can do what you want.
If college isn’t for you, find a trade you’re good at and enroll in trade school. Plumbers, electrictians, HVAC techs, mechanics are never out of work.
Avoid: Retail work. Restaurant work. It will break you. Fine for when you’re in school, not if you’re out of school.