iscsi vlan setup using 5424

Greetings,

I apologize in advance if this question has been asked a thousand times before but I'm just starting to get my feet wet with vlans and everything is still pretty abstract to me and I'm not sure if the answers from the other thread is applicable to what I am trying to do.  I'm trying to create an iscsi vlan that spans two switches, I'm thinking about getting a couple of 5424s for this.  This is how I am envisioning it:

 

A couple of questions first, in the setup above, if I connect both port 1 to my main switch, ports 2-12 will become part of the local main network right?  Ports 13-20 will be it's own lan and will not receive broadcasts from the main network? Are four ports enough / too-few / too-much for interconnect between the two switches?

I have read this helpful page, but I am not sure how to implement the vlan with the instructions provided, I think the vlan setup is just another procedure on top of of the setup shown in that page.

Although I still don't understand most of how vlans work, I feel I'm getting close to what I am trying to do, could someone help me understand this a bit more?

Thanks in advance.

C