Given how recently you've started, this is not surprising at all. It often takes close to 2 full seasons to pop a level in experience.
So as i said, the player has no value to my team in his experience correct?
And where can i find rules about experience?
I don't understand what you mean. He has some experience, just very low. Also, there is no such thing as "team experience".
And for those who wondered: no, experience doesn't go down. Ever.
"I don't know half of you half as well as I should like; and I like less than half of you half as well as you deserve."