None of thr solutions worked for me, i did not find wallet.dat in my system, i also tried the first solution but did not see the option to get the private key

I need help, i installed a bitcoin core on my laptop pc but it is taken too long to sync, i created a bitcoin address which some one sent money to but the fund and the transaction is not showing in my desktop yet, i have confirmed online that the person actually sent the money, but i can not use it or see it in my wallet in bitcoin core.

I am tired of the issue and i created an online wallet with https://blockchain.info but i want to know how to move the fund that was sent to the address i created on the bitcoin core desktop to my wallet online on https://blockchain.info.

Every assistance will be appreciated