I'll leave sewing advice to the experts on this board but I would suggest that you look into Palmer & Pletch patterns. Here is a link: http://www.palmerpletsch.com/patterns-learntosew.htm

Are you using a pattern or are you just winging it??? If it's a pattern,then those usually have very good instructions.
HTH
Kathi

I suggest easy patterns to start with. And stay with Simplicity or McCalls, they have the easiest instructions. The patterns that say easy are great to start with. And if you get stuck head to the fabric store and ask if they have someone who helps or take a basic class at your favorite fabric store or lots of schools have evening fun classes that are helpful.
Lots of luck sewing, it is a hobby that will last your whole life!
Karen L