After i add all private key. What i do next !
Check if the electrum wallet shows any balance. If not, then the funds are stolen and you can't do anything about it, but if it shows balance then you can transfer them in a paper wallet or make an account online on web wallet like blockchain.info and transfer them there to keep them safe from hackers.
You can also tip me some BTC if I helped you - 1May3TVRzjg2cYut5Pn1uJzKFWk9MjyHNH