Is it possible ?

1. To  get training and minor stipend during my game development for the company ?
2. Selling could be done or what ! If so which company do you prefer ?
3. Any letter format you have used for success of the deal ?
4. I also need a share in it , So I might be asking more ( I am confused , Has I think my idea can make enough money for the company ! )
5. Or should I ask enough people to join in developing my game and start working on it , excepted to make a trailer to present to investors so we can get a bigger and better cut with employment to few many people from then on !

WHAT DO YOU THINK ?

SHARE EXPERIENCE TOO.

(I’m not an itch.io admin, Community moderator, or pro game developer— only curious.)

Are you asking about job applications or business marketing? The topic of your questions isn’t clear.

1. To  get training and minor stipend during my game development for the company ?

It depends on the company but you'd better off training yourself. In game development, that is.

2. Selling could be done or what ! If so which company do you prefer ?

I don't think there is any company looking for game ideas to purchase.

3. Any letter format you have used for success of the deal ?

I don't think it matters because of #2.

4. I also need a share in it , So I might be asking more ( I am confused , Has I think my idea can make enough money for the company ! )

Sorry to burst your bubble, an idea is not enough to make money for anyone. Even if the idea has been implemented and been made into a game, there are still long way to go to make enough money.

5. Or should I ask enough people to join in developing my game and start working on it , excepted to make a trailer to present to investors so we can get a bigger and better cut with employment to few many people from then on !

I believe you should make the game first before presenting to investors or anyone for funding.

So get ready to get your feet wet in game dev.