It would be great if you can find some type of internship in the field. Internship/mentorship is a great way to understand the business and how the designer firm operated. If you haven't done any interior design work, most likely mentorship would be the ideal way, which you have a professional designer guide you through and not necessary to work. Most internship require you to have some kind of knowledge in drafting, sketching, and some computer skills. You should be at least in Junior college year or senior year in order to apply for internship. If you just going to college, you can always join the design club or something and start gaining some experiences.
This professional recommends the following next steps:
- Go to college for interior design program. Make sure it has CIDA accreditation
- Apply for internship when you are in Junior or Senior year.
- During your college year, join ASID student. They have a lot of great events and student competitions. As well as mentorship pairing