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I always recommend new shooters purchase a complete Pistol Cleaning Kit, in order to ensure their new investment is protected in value and operation (https://goo.gl/9AQ5mR).
The M&P makes a great carry gun (exposed or concealed), and a reliable Holster from a reputable company is always a popular accessory for any semi-auto pistol or revolver (https://goo.gl/008oUk). I really like the Safariland Paddle Holsters, which are minimal, effective, long lasting, and easy to draw from with still having good pistol retention when holstered.
If you have any personal techniques or tools that you use when cleaning firearms, comment down below! If you have any questions, feel free to ask and I will do my best to help!