Creating a LinkedIn profile may seem simplistic, but there’s a lot to think about. You are working from your resume, but you are not merely copying and pasting your resume. People will read your profile differently than they read a PDF, and there are some things you can do in LinkedIn that you would not include in a PDF of your resume. For instance, if there’s a project you’ve worked on or some multimedia product you’ve created, you can (and likely should) link to those in your LinkedIn profile.
You can find some great advice about how to best create your LinkedIn profile on this LinkedIn Higher Education site and in this article Omar Garriott writes to offer college students tips.
And if you’re curious about LinkedIn’s premium (paid) plans, see this Forbes article.