Independent Writing and Editing Professional
First, define your major interest. Then scour your community for businesses or agencies that include your interests. Then, and this is the hard part, pester them with requests until somebody gives you an internship.
Finally, work your tail off to do the best you can. Ask good questions all the time. Be inquisitive and innovative. Volunteer to do the crappiest jobs.
Getting good references from people for whom you intern are priceless.