Learned a lot, had to go outside my comfort zone a lot, got really good at professional correspondence/communications skills, was encouraged to build my own brand and market myself.
What I wish was different
Wish I got paid, we had a small team of interns so I wish there had been more to work on all the projects/ideas we had going, wish that there had been faster ROI (the company was still pretty small when I got started so sometimes I would email 30 reporters and get 0 replies).
Advice
Take this opportunity and learn the most you can from it, ask questions, put good work in, don't half-butt it, and use this internship to build your leadership skills.