First blood sugar test and it’s 330 before eating

I’m 20 and I know my grandma has type two a few weeks (like 2 maybe) ago, I began chugging multiple bottles of water only to realize I was still extremely thirsty then yesterday I began feeling nauseous constantly and about ten minutes ago I picked up a glucose kit from Walmart and I’m at 330 before eating.

Sorry but I’m a bit nervous as I don’t have any health insurance, but I could use some advice what exactly are my next steps? Also should I be immediately concerned about that reading?