Instruction help

i've this set of instructions but not sure exactly what it means, can anyone help?

To make front head and body:
Cast on 24 sts
Knit 56 rows garter st (1st row is RS), placing markers at each end of 50th row to indicate arm placement.
Shape head- 1st row- Cast on 10 sts, knit to end = 34 sts.
2nd row- Knit to last st, inc in last st= 35 sts.
3rd row- Inc in first st, knit to end = 36 sts.

Does this mean after casting on, i go on to continue knitting for 56 rows?
What happens after? Does the shaping head part continue after the 56th row? How should i move on after the 56th?