Anybody can share with me on guide of how to create a new token in Ethereum?
First of all, you have to learn coding using 'Solidity' then use this amazing platform that will help you build apps in the top of ethereum :
https://ethereum.org/build/What is the difference between token factory and develop your own smart contract?
Any token built in EVM is indeed a smart-contract that defines the caracteristics and functionalities of the token. Once the smart-contract is lunched in ethereum Mainnet, it can't be modified or deleted; that's why you have to learn soldity coding at deep levels if you want to develop the token by yourself, or hire a coder or buy the service from token factories.
I can't garante you that all token factories are trusted, as if you are not a programmer you will never know what's written in the contract. So you may use a token creation service + audit and hire coders to try it and check for potential vulnerabilities.