Re: casting problems?? new fly line
All I can think of is be sure and stop sooner (higher) like the 10:00 spot and let the line straighten out, then lay it on the water.
Try standing slightly sideways and watch your cast. Keep a straight line with the rod like painting as ceiling and be sure you are not windshield wiper it.
Try slowing down and letting your back cast straighten out first, you might be rushing it.