Why you're not getting results from weight training.
You're just not lifting heavy enough.
The point of lifting weights is to break down muscle, plain and simple. When we break down the muscle, it grows back stronger than before. This is what makes men look built and women look tighter. You aren't breaking muscle if you're not challenging yourself with your weights. You should be visibly shaky on the last few reps, and occasionally even lifting to failure. You must challenge yourself!
You're not eating to support your training.
Your nutrition is the most important thing. You make as much progress outside of the gym as you do inside of it. You must make sure you're eating a balanced diet with healthy proteins, carbs, and fats. Everyone is unique when it comes to getting the amounts right, so it's up to you to track your food (try using an app) and see what works for you. If you eat too much, you'll likely have a thick layer of fat covering your gains. If you eat too little, you won't make any gains and you'll likely become 'skinny fat'! Healthy eating 90% of the time with a couple of treats here and there works for a lot of people.
Your form is all wrong.
Proper form is essential when lifting heavy. Poor form could not only result in you injuring yourself, you'll also look pretty silly. Simply check out YouTube for a quick tutorial if you're unsure.
You're not incorporating other types of exercise.
Lifting weights can become addictive. But incorporating other kinds of exercise will ensure overall fitness and health. Focusing on cardiovascular exercise, as well as your flexibility, is always a good idea. You don't want stiff, tight muscles from not being flexible enough. Incorporating things like HIIT will help you to blast that excess fat too.
You're being impatient.
If you've only been training for a short while and you think you should look like a fitness cover model by now, you need to chill out. Changing your body composition can take a very long time, depending on the shape you're in. Building muscle and losing fat isn't something you can rush. Using the 12 Week Trim and Tone Fitness Plan, you can see amazing results!