Now i want to know what will happen to my new tether?
You mush have ether for transportation fee.
does it need ethereum like ncash for transaction fee?
Yes
Is myetherwallet.com a good wallet for tether?
Web wallets are risky to use, mobile wallet is preferable, desktop wallet is more preferable, hardware are the safest.
I will advice you not to use ethereum wallet for tether because of that high fee, use wallet like Trust wallet, send the tether to USDT TRC20 which has very low fee, but you will need Tron for the fee, also you can use USDT BSC (BEP20) for low fee.