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I am really sorry if you are feeling I am not real person and create some confusion here because I am not here for anything wrong just for information, and you already provide good links which I will read and try to understand because few things are very important before jumping into any field but still I am really thankful for your kind information and other details. Just last thing which is a better way to keep my bitcoin safe because I check mostly exchanges needs personal information and I have no problem to provide them this all but is this safe to keep bitcoin on these exchanges or any other way is better, thanks.
There are likely several different ways to hold your bitcoin, and Trezor is pretty good.. either the Trezor one (which is cheaper) or the more expensive Trezor Model T and you want to make sure you get it from an authorized source (or authorized reseller) and with trezor it seems better to use the extra word too and also maybe to have some decoy value that you keep on the regular section that does not have the extra word... and of course, it is up to you how you might organize the various accounts on the trezor and get used to it...
The thing I like about the Trezor is that even with the cheap version, you never have to type your passphrase into the computer. While I'm sure this method is not unhackable, the process goes as thus. On the Trezor screen, while it is plugged into a laptop with the Trezor software installed, the software asks you for the passphrase words. On the Trezor itself, it will show you a 3 by 3 grid with the squares effectively asking you, "Does your first word start with A-C, D-E, F-H, I-Mn, Mo-S... and so on. And, on your computer is an image of your Trezor with just dots in the 3 by 3 grid, but you click the corresponding dot. Ugh. Probably better to just watch the first 30 s of this video
https://www.youtube.com/watch?v=M_fYnZIVw_g And you'll get the idea. [Full Disclosure: You do have to type out on your computer, the extra words of which JJG speaks. Warning: The font is small on the screen.]