[...] I have a virtual switch thats working but I am a little confused at to what needs to be done next. Do I need to create another scens or what ? and then do exactly what
In general, it's a 3 step process:
1) Create virtual switch (your Home/Away light).
2) Set up scenes with triggers to turn on/off the Home/Away light.
3) Set up scenes that are triggered by the Home/Away light being switched on/off.
Think of the virtual switch as a light that you turn on to indicate that you're home, and turn off to indicate that you're away. (Or the other way around; whatever you prefer.)
So, what you need is events/triggers to turn the light on or off. In its simplest form you could switch the light manually through the Dashboard. But you could use more advanced triggers, like motion sensors, a lock being lock/unlocked, a button on a scene controller, etc. Whatever works for your situation.
The hard part is coming up with a good set of triggers that work reliably. E.g., a motion sensor that triggered could be an indication that you're home (or a burglar?), if you have motion sensors covering all your entrances. Etc.
Once you have that sorted, the other part is using the state switches (on/off) of the light as events in scenes to do whatever you want to do when you go away or arrive home.
So if you wanted to do something with your thermostats, you'd create a scene for that and use 'a device is turned on/off' and the appropriate 'on'/'off' for the Home/Away light as the event.
Start simple / go in iterations. You could skip step 2 and do a single, simple scene in step 3. Test the scene with the 'Run' button. Then test it by switching the Home/Away light. Then add more complicated events and scenes.