Hi there,
I agree with Rob in the main.
Imparting all best practices on here would be somewhat overbalanced, and you'd be overwhelmed with info that as you say, you probably don't have time to review in detail.
The Instant APs are fairly easy to setup, and are engineered to be so. We could point you at some quick guides and Youtube videos but I'm not sure that's going to help your journey.
The Airwave is again pretty easy to install, but getting it to deliver as you need depends on what you expect.
Clearpass is a different matter. It's a great product, but for the novice, it can be quite intimidating.
If you're in the UK/Europe region, my company can help you with services (Aruba service partner). If you're in another region, just speak to your Aruba rep or favourite Aruba partner locally?