you can do internship, but sooner or later you'll need sponsorship from the company to become full-time.

intern不能给你办h1呀，如果你用opt时间做intern,除非可以做完留下来转成fulltime，否则做的同时一样还要找fulltime。当然如果实在fulltime机会不多，intern一样可以给你积累经验，但一定要同时继续找fulltime呀。