High school 😒

So I'm going back to high school, I'm 18 I dropped out at the beginning of this year because I moved from three different states in 3 months & when I came back to Georgia I stayed with my best friend & didn't have no money so I got a job & stopped going but I start back Monday I'm really scared, I wasn't really a high school person I didn't have a lot of friends & I skipped everyday but I want to be a teacher & be able to say I did . But is this a good idea or should I just get my GED?