Don’t panic, you’re not the only one nervous about this. Maybe you’ve never had a “real” job, and that’s ok. Think about other activities and tasks you’ve been responsible for.
Experiences like babysitting, completing important projects at school, or being involved in sports have taught you valuable skills that can be applied to your desired “real” jobs. Don’t discount these experiences because they do not fit the requirements of a “real” job.
Take the time to reflect on what you learned and how it can apply to your future jobs. The goal here is to focus on the skills that you have gained from each experience in order to add these to your resume.