Don't be sorry! Everyone here is in some stage of learning FileMaker, and that's why everyone else is here. :-)
If you need a script, then go into ScriptMaker, create a new script, and follow these instructions:
From the commands on the left side, select: If
On the right side, you will see "If " appear, with "End If" immediately below it. With "If " highlighted, click on "Specify". This brings you to another screen to enter the search criteria.
I'm assuming your (something) is a field name, so on the left side, find the field you want to evaluate and double-click it. The field will appear in the bottom portion, perhaps preceded by the table name. Enter "=" and then enter: "Y". Click OK, and you will be brought back to the Edit Script window.
Next, from the left side, select: Go to Layout
Add this, and you will see it appear indented just below the If command. Select the Layout you want to view.
From the left side, select: Else
From the left side, select: Go to Layout
Select the Layout you want to view if (something) does not equal "Y"
Your script should now look something like the following:
Go to Layout ["Layout #1"]
Go to Layout ["Layout #2"]
In essence, we check to see if (something) equals "Y". If so, we go to Layout #1. If not (else), we go to Layout #2.
This should get you pointed in the right direction.
Let me know if you want me to clarify any of the above steps.