Not sure about the differneces between saking with Maiar and Elrond.
If you add yourself to the waiting list you can withdraw your EGLD immediately, there is no lock up. With active, there is a withdrawl delay of 7 days I believe. The staking benefit in active list is 29% APY, in waiting list its a lot less... it will be 6% and eventually nothing. There are no exit fees.
The chance of you becoming an active delegator is very low if you joined the foundation staking programme - you are better off trying to get into a stake pool in phase 3
