Working on own startup instead of an internship. How to make sure I'm learning?

[vdthatte]

I'm a junior in college majoring in computer science. This summer I decided to work on my startup instead of getting an internship. But I see all of my friends spending 8 hours a day and learning how to work in large teams and learning new technologies. How do I make sure that there's no stagnation in what I learn or is this something to even be concerned about? Would love your feedback/personal experience! Thanks (In my startup I'll be working mostly on iOS and React for dev stuff)

[jrswab]

I'm in the works on a start up as well. I think the best way to avoid stagnation is to challenge yourself. Back when I was looking for a job I had the option of two. One with a small company basically being the whole IT department and one with a big name company doing menial work. I picked the big company and kind of regret not going with the small to learn as much as I could have from the challenge.

[vdthatte]

Thanks! What are some things that you did to challenge yourself? or do you have any suggestions about how I can challenge myself?