You're not going to lose the account. There were some bugs in the past where people had to wait for a while until they were fixed and manually merged, but no one actually lost an account.
For peaceful play x1 or x2 fleet speed would be the obvious choice.
Thank you all for the responses.
So I just should let the account go into inactivity for 2 months, right?
There is no other way to move it faster?