How do I flatten my swing

Since I have taken golf back up I have played with 3 different people that has told me that I need to flatten my swing/plane. I understand what they are talking about but how do i do this. My drive is horrible the rest of my stuff is decent for my level. I know I dont have the hip rotation that I should have and I think I need to improve in keeping my elbows pointing downwards. Just wondering if there is any common mistakes that this problem has.

One guy who says he will go to the driving range with me said I need to swing inside out. If I fix my swing plane would that take care of swinging inside out. For now he wants me to practice just hitting ball standing with one foot infront of the other. (Right foot toe touching the left heel)

I know there is a couple traing aids that helps teach the inside out concept one I seen on a PGA DVD it was a color coded chart that was designed for self teaching. Dont remember the name of it.

Thanks for any advice and tips.

They can see your swing and we can't. Sounds like their trying o get you to swing from the inside. That could involve more than just flattening your swing plane. It is really hard to comment without seeing your swing.

I knew it would be hard to see. I think I swing my driver the same plane as my 7 iron. Perhaps in the next few days I can get a video together.

Thanks