I can not play the games of an account having the main xbox

If you are game sharing, your friends profile has to be set as the home account on your console for you to access and play the games, this does however restrict him/her playing the games on their own console, it may be that they have had to set their own
console back to home to play games.

Its not advisable to game share and be aware that you can only change your home console settings 5 times a year. For further information about it check the link below.

https://support.xbox.com/en-GB/games/game-setup/my-home-xbox

Make and be sure it is set as home xbox

So I want to get all my game data onto one of my xbox accounts because I don’t want to keep switching accounts to play games and to have all of my friends on one account

Hello,

How are you. You can't MERGE Xbox Live accounts, however you can have a main Account for yourself and other accounts that you have. Either you can make your main account that you have all your games and friends on the main or you can create a new one and
start fresh. Everything is saved on one main Xbox LIVE account.

Best,

Philip

On my account, I can not put my main xbox, so I can not play my game offline, It says that i can do it three a year, need help to be able to put my account in xbox main, sorry for my english im russian

Or you could simply buy a game as a gift with your account that has the money, and gift it to your main account.

Your main account gets a message with a 5x5 redeem code, and then your main account can redeem the game.

But as the others already said, as long as your main account is playing on the console that your buyer account has set as their Home Console, your main account can also play the game.