Before you buy any wall mount bracket (bracket), check and measure your wall.
Make sure the bracket you purchase can handle well and above the TV weight. If your TV weighs 10kg. look for a bracket that is capable of handling 4x the TV weight or 100kg. It might sound like an overkill until a child pulls on the TV and it falls on them or someone trips near the TV and grabs it on their way down. Beware of the cheap "knock off" brackets.
After hanging the bracket (before you place the TV on it), find a way to add some weight to the bracket to make sure it is absolutely firmly in place.
The biggest concern mounting on the wall is wiring in the wall. It's hard to be sure, but be careful not to drill or screw into any wiring.
You should wire a proper wall outlet for your power source. Other wiring methods such as running an extension cord through the wall do not comply with cabling regulations in most areas, and also pose a fire danger.
Any data cables going into the wall must be to special code to pass any future inspection on your house (such as selling the house), for fire risk etc. When you are shopping for cables ensure you ask at the store. You will pay more but will not run the risk of having to pull them out after inspection.
If you are mounting above a fireplace, make sure it is adequately vented and not trapping heat or the majority of the heat is not flowing directly to the TV.
The best advise we can offer you is to call BlingStallation for a professional installation!