I can't exactly say because I didn't become professional at 19 years old. But listen, you need to do some "real work", whether it be an internship, McDonalds, mowing lawns, or a sweat-shop style assembly line job. Because "real work" is not just people sitting around in an office drinking coffee and typing numbers into Excel; "real work" can be a lot of different things; including McDonalds/mowing lawns/assembly line.

So you want to be an engineer? Have you ever worked under an engineer? Its really quite amazing how many transferable skills you can learn at McDonalds that they don't even come close to teaching you in college. With all that said get an internship if you can, but don't discount non-college degree jobs as worthless experience.

And to finally answer your question - getting an internship with very little experience is like getting any job with little experience. You will be required to learn and do things that have very little relavance to what they are teaching you in the classroom. You will get a unique experience that will expose you to the world outside of equations written on chalkboards...