Plus a couple extra advice:
-Always warm up properly (shoulders and elbows, knees are especially easy to get injured)! Also stretch afterwards.
-If you are new to this, I would do full body workouts, which consists a basic set of exercises for you whole body. At the beginning there is no point in exercising the different muscle groups (someone will disagree with this) on different days, get your body used to this new kind of stress. Couple weeks/months, and you can start looking into more advanced plans which suits you, and you can split your days. (I got 4 days now, chest, back, arms, and leg + shoulders)
-Don't overdo the weights (just because someone else your size can do it with x kg, does not mean you have to do it as well), and focus on doing things right. There are good videos on the internet on how to do anything you want to do basically. Not worth to get yourself injured.
-Try to eat well. Without eating properly, there will be no gains, just fatigue.
-Rest enough. Try to sleep 8 hours at nights, and keep rest days too.
-Don't try to compare yourself to other people in gym, you are trying to beat your own limitations, and not racing others.