However, you're not alone in your experience; many people find meditation difficult to grasp at first. This is because our minds aren't used to being completely quiet, and it does take some practice to stop thinking about the future, the past, our to-do lists, that jerk at the office, and all of the other things we need to think about in our daily lives. Meditation for beginners is a skill that takes time to master, like any other skill. Once you realize and accept this, it's actually easier to learn, in most cases, because this understanding quiets your 'inner critic' and the negative self talk that sneaks in and provides a running commentary on how you're 'not doing it right'.
Fortunately for beginners, there are many different types of meditation to try, so if you can't get into a meditative state as easily using one technique, there are several more to try. (This article on different types of meditation can give you more ideas on what to try, with resources on how to get started.)
More good news about meditation for beginners is that you don't have to sit in a room in the lotus position to do it. Certain activities that allow you to 'be in the moment' without having to do a lot of thinking, such as getting exercise, doing yoga, or even gardening, can help you to get into a meditative state of some sort. This can often seem easier when you're just starting out, and can give you practice in maintaining a quiet mind and staying in the moment. As you try these things, just try to focus on what you're doing and be fully present; if you notice yourself thinking about anything else (in other words, if your inner voice tries to start a conversation), congratulate yourself for noticing, and gently return your attention to the present moment. With time, it will become easier and easier. Good luck!
Related: Meditation For Perfectionists