What do you wanna do when you grow up? I wanna continue being a gamer, and I wanna be an artist.

I will a gamer y.o.u.tu.b.e.r and artist and gymnaster and contortionist and I am flexible

Oh, same as me, I want to be a gamer, artist, and I want to be an inventor too, I love making craft.

relief sculpture - images are set against a flat background.

a coin is a good example: the inscription, the date, and the figure are slightly raised above a flat surface. the ancient egyptians sometimes carved figures into a flat surface.  

pro: they take significantly less time to make and do not require as much tools or skills as free-standing

cons: not nearly as realistic, as it is not fully 3-d, and does not have the details that a free-standing one does.

freestanding sculptures (also called  carved in the round) are not attached to any  background.   they are 3-dimensional  and fully rendered.