If you are not able to maintain your balance in your swing then this is a great video for you to watch. Greg explains where your balance should be through out the swing.
Here is a great training you can use at home to help with your balance. The balance rod by EyeLine golf is a great aid. I have one and use it often in lessons. Here is a link to it and use promo code gbgolf at checkout to save 10%. https://www.golftrainingaids.com/products/balance-rod