The golf swing action works with cause and effect. That means, that you should concentrate on one problem at a time.

Find some pictures of pro's in their address position. Try to replicate them: stand sideways in front of your mirror and practice the address position. Because the golf swing is cause and effect, fundamentals are so important! It all starts from the basics.

You can find plenty of instruction for a proper grip on the internet and in almost every golf book you can find.