So you're looking to get into weightlifting, congratulations! You're about to embark on the journey of a lifetime in one of the best hobbies out there. Before you jump headfirst into working out though, there are a few things that you need to consider:
Know Your Limits
The most important aspect of weightlifting is the mental aspect. If you're not able to jump your body's natural hurdles and force yourself to new heights then you're never going to succeed. Unfortunately, there is another side of that coin. If you push yourself too far you risk injury, and that can shut you (and your results) down indefinitely. Know when to push things and when you need to pull back.
Make Sure To Even Things Out
Beginner weightlifters make this mistake more often than not. They'll pick one or two muscle groups and decide "these are the groups that I'm going to focus on". Finding something you like is a good thing; but it can't be at the expense of your other muscle groups.
The human body is a very fine tuned machine, and it depends on balance for both maximum performance and maximum safety. For every muscle group that you work out there is a converse that needs the same amount of attention.
Find A Way To Work In Some Supplements
It's going to take a very long time to try and build up your body with just exercise and food. You're going to need some help if you want to see real results. Fortunately, there is a litany of supplements out there that will help you to build muscle mass faster. To start out, look for a good multivitamin, a whey protein supplement, and some creatine. That, with a good diet and a lot more water, should be more than enough to get you started!