Hello, sorry if my question is not allowed. I found the faq but was unable to open it. I wanted to ask, I watched sword art online I and II, did I miss anything? Also, where can I read the graphic novels or light novels to be able to follow the story

It’s fine to ask if you can’t access the FAQ! If you watched SAOI and SAOII you’ve watched pretty much everything important the anime has to offer. The anime covers everything up to Volume 8, so if you just want to read the next arc I’d say to start from Volume 9

Main Series Novels Google Drive Link
Side Stories Google Drive Link (in case you want more to read after you’re caught up)

I hope I could be of help!

- Mod Fil