Brand-new user need help

I purchased LiteCoin through CoinBase, & set up a wallet with Electrum-LTC 12/11/17

CoinBase shows the purchase, which according to them should be available today ~ but I do not see the funds. LTC wallet reads 0.00.

When (If?) the amount shows up, how do I transfer to Electrum-LTC wallet? & Why is that necessary?