Welcome to TST. You'll find there is a lot of great information here which will help your game. It's great to golf with your dad but don't hesitate to pair up with strangers. It's a great way to meet people and make friends.
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I have used this app in the past but when they added the new features and wanted to charge extra for them, I abandoned it. I now just use my rangefinder. The app would reload frequently. It seems the app is still in beta mode although it has been released as a final product.
A temporary fix, using a yoga block or a water bottle. Set the yoga block about 3" outside your ball and about 2" behind it. A visual presence is sometimes the key to helping achieve the desired results. If you are indeed swing out to in, you'll hit the yoga block and send it flying. With the visual in place it will help you to focus more on your swing path.
Best bet...go take a lesson, either in person or online.