Is this site  ,,bitaddress.org  good for a wallet

Will it work with litecoin,,,or any recomemdations for a litecoin wallet.

Im  very new,,,i have a few lite coin,,,stored in coinbase,,,when i could not transfer them to mycelium,,i e mailed to my self,,,that created a wallet in coin base.
Every time i try to paste my mycelium address  into SEND box of coin base,,i get,,,Not Valid Address,,,,my mycelium is BTC

How to i get ,,or  do i need  a lite coin account in mycelium

Also question two,,( has two parts ),,,,i also started electrum wallet,,how do i get a litecoin there?

And part two,,,i wanted cosign devices,,,but  when i pasted the master public key of one device in the other...and vise versa,,it keeps  saying  duplicate,,,,what am i doing wrong there?