How could I forward my domain to auto scale group's instances

AWS horrible documentation is killing me T_T

I set up a auto scaling group with my prepared images.

Then I can not found any way to point my domain sample.co to my instances.

I've setup the domain in route 53, What should I do now ?

I still can not get what do the load balancing and auto scaling do in the left bar on the console.

I just want to get the domain can point to my auto scaling group's instances.