If not, how do I register?

Right now all you have to do is be following for 2 weeks.
If you want voter ID go to the DMV. It's not the law tho.
imgflip.com/m/IMGFLIP_DMV

You have to follow the stream 2 weeks prior to the election. But yes, you have registered.
Voting doesn't begin until the end of the month, so I suggest using the remaining time to get familiar with the parties, and cast your vote knowingly.
I'm SuGaS by the way. Welcome to I_P!