Sounds like you are drawn to Graphic Arts degree program in college, or if you like the mechanisms of how things work, then maybe Mechanical Engineering program would suit you better.
Either way, load up on as MANY computer design classes CAD, Illustrator, etc. that the school has to offer. Most jobs nowadays in those fields, are asking for the applicants to be well versed in at least 3 different computer design programs. This is the future of ALL design related positions. And new systems are being developed almost on a yearly basis.
D.R. recommends the following next steps:
- Research art colleges that offer CAD courses especially in the fields that you like.
- If you can afford the price, invest in some computer design softwear, and start teaching yourself! Look for used ones just so you can get familiar on how they work.