First of all, every player needs to know how to hit a one-handed backhand- even a player who has a great two handed backhand. One of the real keys to the successful execution of a one-handed backhand is the role that the non-dominant hand plays during the stroke. As you begin the forward

swing with your hitting arm on a one-handed backhand, the other arm needs to extend back and away from your body.

Learning to consistently win points has much to do with understanding what shots you are MOST comfortable playing (as well as which shots you are uncomfortable with). In other words, when you get a ball that you like, take full advantage!

The Eastern forehand grip is the classic grip most often taught to beginning students, and although it has been largely displaced on the pro tours by the Semi-Western grip, it is still used by many advanced players.

There are no mistakes only feedback. If you hit into the net, hit higher next time. It is that simple.  You don't have to complicate things with knees, going under the ball and follow through. It will all happen by itself.

My favorite tennis tip for a beginner that you can apply is to wait. Yes, wait, because it takes time for your brain to start making adjustments from all that information coming in. So when a coach instructs you hit in a certain way or aim for certain area of the court, do your best to hit that. And then wait until your body adapts. Don't look for results after 10-20 shots. Wait. The results will come, be patient.