What grip for serves and volley?

My friend tells me continental and so do some youtube videos. But I'm having trouble hitting the ball properly on forehand volley and serving. When Iserve it feels weird to hit it with a continental grip, and the ball just lands on the net . It feels like I have to rotate my arm a lot so that the ball can hit the strings. If I normally serve it like I normally do, the ball hits the frame. Any tips on serving? that's the main issue.. I can serve with eastern grip but i can't with the proper continental one.