If you're a complete beginner, you can start by activating your muscles by doing bodyweight exercises and then incorporating light weights into your workout routines.
As a beginner, keep the weights light and focus more on your form. Building a good form, will help you lift heavy gradually in future and keep you away from injuries.
You can build a routine on the basis of muscle groups to focus - push, pull, legs.
Additionally, do not forget to include cardio and core workouts in between. Cardio and strength training both compliment each other. Combination of both is the key!