You're doing great as an administrator, and no doubt was as a moderator too. However, I think it's a bit early for you to apply for SA. Yes, you are doing a good job as an admin, but that doesn't directly translate to being a good SA.
I think you should show a bit more leadership, help new moderators to a greater extent and wait a little longer and gain more general experience and you should be good to go.
For now

Good luck!