I loved the ability to make the internship as involved as you want. My manager asked me the first day how comfortable I was with certain tasks and what I thought I needed to work on, and he helped me figure out what my strengths and weaknesses were in those areas.
What I wish was different
I wish I would have tried more things I did not know I was capable of earlier in the experience. I should have been more alright with not being successful the first time I tried something.
Advice
Go all in, it was a summer experience so you always think that you have more time, but it goes quick so try to make the most out of it!