Need help in Sharepoint 2013

Hi,

I am new to Sharepoint. I am using Sharepoint Designer 2013. Need pointers/sample code to accomplish the below.

I have to 2 custom Lists like below.
Ex:
State (Custom list1)
State
AP
UP
MP

City (Custom list2)
City State Desc
KNR AP
WL UP
NZB AP
SRC MP
HZB UP

I have to create a page, where I have to load dropdown values from 1st list. When I selected the value from dropdown, I should get all the selected dropdown value related data from 2nd list
in a table/grid, where I have to edit the table and save.