Hiya!
As someone had mentioned, to qualify for an internship, you'd need to be a full-time student and we give preference to students looking for internships for the summer before their final year.
That said, I don't want to discourage you from applying to Riot! Various positions at Riot do state that we'd like to see a BA, however, we also don't mind the equivalent real-world experience! College isn't for everyone, and there are certainly people who are self-taught programming beasts. Or, maybe you didn't go to college, but you have a killer eye for design and an awesome portfolio to show for it.
The best advice I can offer to to find that skill you are mastering/have mastered and really focus on that. Find the resources that can help you - maybe that means watching YouTube tutorials on how to model, or learning how to code in various languages.
This LinkedIn page is also a fantastic resource. Riot Careers offers advice/feedback from fellow applicants, as well as from Rioters in several fields. Applicants also share their experiences!
Hope this helps a bit!