Don't know if you have experience mounting a tv to a wall or not, so I just wanted to offer a couple tips for you!
Check product dimensions you ordered with the location of where you want to mount your TV. If there will not be a stud available for at least 2 mounting points, I would recommend using snap toggle bolts (you can find them at walmart, lowes, or any number of stores like that). They are great for hanging heavier objects on drywall where you can't mount to a stud.
Also, use the spacers that will surely come with the mount. Many people pass on them so the tv sits closer to the wall, not realizing two things. The spacers allow you to get your hands in behind and plug things in, which you will be doing occasionally I'm sure. And second, it gives the back of the tv much needed space for cooling. You don't want to smother the tv and leave nowhere for the hot air to go. Heat is the enemy of the capacitors and other bits inside your tv.