I think it must fun to be a Disc Jockey.
There are different types of DJs.  There is a club DJ, a radio DJ, and a turntablist. 
I was thinking about club DJs, what is a turntablist?
A turntablist uses a record player to manipulate sounds like scratching on a record. 
I think I would prefer to become a club DJs, any idea how to begin?
I have no idea how to start doing that. You could ask local dance clubs or nightclubs what they are looking for. 
Yea I guess, thank you.  Do you know if DJs are well paid?
I don't know what their payscale is. You can disc jocky with something as simple as a USB stick. 
That sounds easy but I guess the thing that takes time if to prepare the music beforehand.
Yes that would make sense. Since DJs create mixes of music for distribution too.