I am a freshman in high school and I took a practice SAT test just to see what it was like since I'll be taking it for real soon, so yeah, I didn't have any training or taken any practice classes or anything like that and I got a 1600. Is that good? Bad? Average? Or at least good for not taking any classes first?

1600 is a top score if you're using the 1600 scale. If you're on the 2400 scale, it's mediocre.

SAT - Wikipedia, the free encyclopedia

Now, don't blow it by being overconfident when you take the final test.