I’ve been skiing 35 years. Last year I broke down and bought a pair of shaped skis. I’ve gotta say, I am very impressed with them.
To use them properly, you don’t ski in the traditional way. On traditional skis, turns are made, as explained above, by weighting and unweighting. Weighting and unweighting is essentially bouncing up and down - when you push down on the ski it bends, and you turn; when you pull up the turn stops and you can reweight and turn the other way.
With shaped skis, all you are supposed to do is turn by tilting your ankles in the direction you want to turn. The curve in the ski takes care of the rest. It actually works very well, and takes alot of strain off your knees and thighs. The only price you pay is that curved skis, by their nature, want to turn all the time, which makes them less stable (more squirrelly) when you want to ski in a straight line. These problems really only matter at speed, so it shouldn’t bother a beginner too much.
My advice is to go with the shaped skis to learn. If you decide that skiing is for you, you may want to invest in traditional skis later, and learn to ski the “real” way. Learning the “proper” traditional way to ski is alot more work, but it will make you a much stronger, safer, and versatile skiier.
BTW, if I can impart one little bit of wisdom on learning to ski, it is this: The one thing that most beginners fear, but that is absolutely essential in skiing, is “leaning out” over the skis. To control your skis, you have to be perpendicular to them. So if the hill has a ten-degree pitch, your body has to have a ten-degree pitch, too. If you keep standing like you were on level ground, you are “in the back seat”, and your skis want to slip out from under you. It feels weird for a while - like you are leaning way more than you actually are - but concentrate on it and you will be skiing well much faster.
Also, as you improve, you will learn that speed is your friend. It’s counterintuitive to a beginner, but the faster you go, the easier the physics of skiing get.
Good luck. Don’t get discouraged - skiing definitely takes a while to get the hang of. Stick with it and you’ll learn how to fly without leaving the ground.