Although there are many sites that claim that they will show you weight training exercises online, in reality this is not the way to go. If you want to start a weight training exercise program, you really need to be working with someone else.
There are many options available. You can go to the gym, use free weights at home with a buddy, or get one of those machines, but if you do not do your weight training exercise with proper safety precautions, it is quite possible for you to get seriously injured.
I recommend doing your weight training exercise at the gym. There are several good reasons for this, and I will go ahead and tell you some of the very best ones. First of all, you can get a spot at the gym. Of all of the weight training exercise injuries, most of them could have been avoided with a proper spotter. This is especially true with free weights which can injure or even kill you if you are forced to drop them based on muscle fatigue.