>>10756965 pb
Go inside. There will be tables and lines. When you get up to the table, they will find your name. Once they do, they will show you to a booth where you do the actual voting. Instructions are posted there on how to do it.
You won't have to figure out much.
Getting over the fear of not knowing stuff is a superpower. The secret is no one cares if you are a doofus or not, and likely you will be the only one who thinks so anyway.