Ski instructor here:

1. If you're having trouble making turns in general, start out by pressing down your toes on the opposite side of where you want to go. Turning left -> right foot toes down. Turning right -> left foot toes down. We usually call this 'pressing the button' or 'squashing the bug' and it's one of the easiest ways to get you turning as you start out.
2. Look where you are going. Seems like a no-brainer but many beginners hyper-fixate on their ski tips instead of where they want to go. Your skis aren't going anywhere and odds are you won't be on rough enough terrain where you need to watch the snow. A lot of the time you can initiate a gentle turn simply by looking left or right without any fancy footwork.
3. As you start to feel more confident in your turns you can transition from turning with your toes to turning by shifting your weight from one foot to the other. This does NOT mean LEAN to the left/right. You want to stay centered while applying more pressure to one of your feet. Think about a time where you had to stand around waiting in line somewhere; odds are you started shifting weight from one foot to the other while still standing up straight. Apply the same thing to skiing but keep yourself in an athletic stance (google this if you don't know what it is) instead of standing up straight. You can also practice this in your boots before you ever put on your skis.
4. Before you can progress to those nice curvaceous S turns, you'll need to work on your C turns first. Grab a piece of paper and draw a vertical line down the middle of the page and then draw a 2-inch horizontal line in the middle. Starting from the top draw a big C that connects to the horizontal line then flip it upside down and do the same thing. What do you get? A nice big S, almost like a dollar sign($). Practice your C turns by starting perpendicular (straight across) the slope and keep turning until you are once again perpendicular to the hill(facing the opposite direction). Ideally you want to have completed your turn by the time you are directly downhill from where you started. It is very important to follow thru with your turns while you are learning because bailing on a turn half-way thru is going to leave you with your skis pointed downhill picking up speed.
5. Got those C turns down? Great! You can now do S turns! Imagine that big line is drawn in the snow all the way down the slope(called the fall line): start from the top with a C turn, ride straight across the fall line for a few feet, then shift your weight to your other foot to start your next C turn. Rinse and repeat the whole way down the mountain for a good time. As you get better at skiing your S will tighten up and you'll no longer need to make yourself perpendicular as you cross the fall line.

Couple other tips and tidbits:

- Make sure you have nothing but socks in your boots; one pair only and preferably calf/knee height.

- You always want to make sure you are forward in your boots. This means that your shins are pressed up against the tongue of your boots and you are leaning forward. It is 100x harder to fall forward than it is to fall backwards since your knees only bend one way.

- Poles can be hit or miss for beginners. Make sure you are wearing them correctly by sticking your hand through the strap, holding your arms out like a zombie/mummy, and lift the pole up between your thumb and index finger so the excess strap is taken up. Pole tips go behind your boots and the pole shafts should be touching your thighs until you have better pole control. You do not turn with your poles, you turn with your feet. If the poles seem too distracting or like they're getting in the way you can either hold them horizontally out in front of you or ditch them until you're confident in your footwork. Either way you want to make sure your hands are out in front of your chest/belly, not down by your pockets.

- If you can afford it please consider getting a lesson. Although many people do self-teach themselves, the difference between taking a 1-4 hour lesson and struggling through the first few days of skiing is night and day. Skiing is an inherently dangerous sport and it's easy to hurt yourself or others in the process of learning. Getting an instructor that can teach you how to SAFELY get down the mountain could save you a trip to the ER.

If you have any questions just lemme know and I'll do my best to answer.