Summarize this article in one sentence.
Starting your weight training workout by doing some cardio is a great way to make sure your body is warm enough to perform some of the moves better. Do some cardio with a light jog on the treadmill or outside and stop when you are just starting to break a sweat. Follow up with some stretches before you weight lift. When you are first starting your training, it’s important not to push yourself too hard. The size weights you lift in the beginning should be light enough that you can perform 2-3 sets of 12-15 reps.  Stay away from the “go hard” mentality in the early days of training. Your muscles shouldn’t be pushed to the maximum early on. During your first workout in the gym, do 2-3 sets of 12-15 reps with the weights. You should feel a burn, but not to the point of exhaustion where you can’t push yourself any further during your reps. After the first 10-12  reps, there should be 2-5 reps left “in the tank” that you could perform after each set if you wanted to. Doing weight training exercises in a pattern with reps between 2 of 12 and 3 of 10 helps you process the motions as their happening to your body. Muscles will also be able to learn to adapt to the weight you’re placing on them. Barbell squats are a very common way to weight train, but it’s best to start light so that your body can get accustomed to the technique. As you get stronger, incorporate dumbbells and then barbells.  Squat by standing with feet slightly wider than your hips and toes pointed slightly outward at a 5-20 degree angle. Look in front of you and find a spot on the wall to concentrate on as you squat down. Put your arms outward in front of you, in line with the ground. Proper technique will help prevent injury. Your spine should be in neutral position and kept straight as you lower into form. Make sure that your knees do not go beyond your toes.  Do 5 sets of 5 squats or 25 squats total. When you start to feel gains from your workouts, incorporate dumbbells instead of just your bodyweight. Week by week, you should be able to increase your weights by 2-5 percent. Squats and deadlifts are more complicated than bicep curls. When squatting, if you find that your form begins to suffer during the last few reps, try to perform fewer reps per set. It’s your body’s way of telling you it’s reached its limit. Work your way up to higher reps as you continue to train.  Give yourself 1-2 minutes in between rep sets to make sure you are maintaining proper form while you exercise. Lighten your weight if you feel yourself struggling.  Focusing on your form is a part of teaching your body proper technique. The earlier you do so, the better your weight training journey will be. Weight training works by progressively increasing the amount of weight that you move with your body. If you're inconsistent, you'll find that your progress stalls.  Progress is something that happens over time. Make weight training a lifetime habit in order to see results gradually, all the time.

Summary:
Warm your body up with cardio. Find dumbbells that are light enough for you. Perform dumbbell exercises in a pattern. Use your bodyweight when first learning to squat. Focus on proper form. Be consistent with your training.