Spaceod- Welcome to the forum--
You've got great advice from the guys-- just tie a 1" piece of yarn in the middle as a practice "fly" if you want to do some casting on the lawn.
You'll get to know the feel of the fly line after just a little while, but for now one thing you can do is to open up your stance a bit so you can look over your right shoulder to actually watch the line straighten out on your backcast before you start the forward cast.
And remember the more line you have out in the air, the longer you'll have to wait for it to straighten out behind you. Keep in mind that the keys to good casting is timing- letting the line straighten out before beginning the forward and back casts, smooth acceleration on the forward and back casts and sudden stops at the end of the forward and back casts rather than brute strength--- it's almost an irresistible tendency to try and muscle our way into greater distance, but if you get the chance to watch Joan Wulff who is now around 85 years old and maybe 100 lbs soaking wet you'll see how effortlessly she's able to throw a long line with her excellent timing and mechanics: