Hey, I think I can answer some questions
For your laptop, I don't know but take note that it's a gaming one, you said. Scirra is good a publishing almost everywhere, and I have it on a Windows Vista.
Coding is not difficult with Construct, but if you want to add your addons, it will be harder
If your not a business organisation, you can take the Personnal one. See How Construct 2 licences work and What licence do I need tool.