it's good to practice the 40 essential drum rudiments

An electronic drum pad is basically a practice pad with a pressure sensor in it. When you hit the pad, the sensor transmits an impulse to the drum brain, which triggers whatever sample you've set up for that pad.

Beater pads will make the drum head last longer. So if you like the head you got, use a pad.

A bass drum hoop is the outer rim of the bass drum that sandwiches the bass drum head to the actual shell of the bass drum.

Bass drum.

The bass drum in a trap set is also called the kick drum.