Help about to get segwit address

[taera249]

Here from Google search I  guessed that the address that starts with 3 is known as segwit address .
Now here I want to know that I am right at my knowledge ? .
And second thing if I am right then give me any site ( trusted 100% ) from where I can get my segwit address .
And also not only I want get address but also can import in mycelium Android wallet using private key .

So guys please clear my confusion whether I am right or not and give solution for it .