Solved

League Host

I created my own league but I wanted to start again in rookie, how is it possible?

https://igpmanager.com/app/p=league&id=12707

Just create a new account, but you should then pull this account out of any leagues it is in.

Sorry, it's not easy to understand everything, if I create a new account, I have to get out of my league with my current account and no longer use it, right ?

You can change host of a league to the new account from your old account

Is it allowed to have 2 accounts?

Yes, there are even manager with 3 accounts and more. It's just considered bad manners to have more than one team racing in the same league and tier but I don't know if it's actually forbidden as such. Best thing would be to race in different leagues altogether, makes sense anyway since it's quite hard to manage two teams well at the same time.

Thanks a lot for your answer and sorry for my bad english

You're welcome and no worries, it's not bad at all and it's just a forum anyway.