You should start asking about internships as soon as possible, possibly even in high school.
Here is an interesting internship story I would like to share:
During my daughter's senior year in high school, the highlight of the year (and of the whole high school experience) was to be a several month long internship program. Everyone signed up and indicated the type of internship that they wanted - all except for one girl. This girl wanted to become a doctor and wanted her internship to be with the local EMS unit at the local fire station. So, she talked to the head of the EMS unit and got his approval and made arrangements with the school to create her own internship. Of all of the students about which I heard, she was the one who benefited the most by her internships. My daughter's was definitely not the highlight of her school career. Her first choice fell through and her final assignment was not really what she wanted and did not give her the type of exposure that she had hoped for.
This shows that you can create your own internship! Locate a company that fits the parameters of the type of experience and exposure that you are seeking and work with them and the appropriate people in your school to put it in motion. After all, if there is an internship program existing today, anywhere, it had to be created by someone.
Also, here is an interesting site fo visit:
I highly encourage you to start seeking out internships as soon as you have the opportunity to. Looking for internship opportunities throughout your college career is a wonderful way to get some exposure and field experience in the area you might be interested in pursuing. Securing a position with the company you've interned for isn't always guaranteed, however, it happens very often and at the very minimum you will have built some important networking connections that could lead to more opportunities and also valid bullets for your resume. You can go about this two ways. First, if you have firms or companies you are highly interested in, check out their Career section on their website. Often, internships are listed under Jobs or email them your interests. Second, as soon as you get in, I would visit your university Career Services center -- they will be your key resource and have built some wonderful partnerships and connections with companies where you can interview to intern. good luck!
Stefania recommends the following next steps:
I would encourage you to begin inquiring about internships before college. You will get on their radar and start building relationships with people. When you are ready to apply then you will have a leg up on the other applicants.
Before, during and after! Make as many connections as possible. Always keep learning and always stay humble. There is always someone who knows more and usually that person is willing pass that info on if your willing to work hard and listen. Good luck!