Warning: your first try at macarons will not look like the picture
I learned the hard way that not mixing the batter enough leads to little domed tops, not flat ones. My kitchen looked like it had been hit by a colorful, lumpy hailstorm.
So when you say figure eight consistency like @vera668 mentioned, is that the exact moment you stop folding or do you go a little past that? I've found even a few extra folds can make the batter too thin and then they spread into sad little puddles.