In near future I planed to mining coins. I do not know anything about that. For begin please tell me what is the best processor for that job. Thanks! 
Bitcoin mining using CPU is not profitable anymore. You will end up burning electricity only but you won't receive anything in return. Currently the best CPU available in the market is Intel i7 8th Generation. But that won't produce required hash rates for finding even a single block. So if you have a plan to mine bitcoin using CPU, please drop it.
However, if you are planning to mine altcoins, then you may use the above mentioned CPU, but I am doubtful about the end result. Most of the altcoins are significantly pre-mined so the difficulty level will eat up your profits. please visit the below website to know more about the difficulty level and mining profitability to decide for yourself.
https://www.coinwarz.com/charts/difficulty-charts
If you are planning to enter in to mining, use mining rigs. It will be expensive at the initial level. But slowly you will see the profits.