As stated elswhere, good to see you back on AO
You'll get differing views but as you know my cars and how I keep them hence I trust you'll accept my advice.
Personally, I stick with Autoglym products from the off.
You might want to consider buying yourself a genuine AG Life Shine kit off the bay. If you do, wash the car thoroughly first and then Clay your car with a Megs Quick Clay kit before application.
I didn't bother though. AG Aqua Wax (or Express Wax) is really excellent. It's magic to be honest
After a wash (using a Megs grit gaurd bucket, some decent wash / wax shampoo and some dual sided microfibre wash mitts - tesco's finest are great), rinse it off and while it's still wet, spray lightly with the Aquawax (smells lush, like hubba bubba gum) then dry / buff with a decent microfibre cloth.
Every now and again (and definatley from new), remove any tar (claying or a solvent will do this) and treat it to a coat of AG Ultra Deep Shine or even better, the new and excellent HD wax.
Another suggestion is to get the sills covered in stone chip film to prevent the rubbing from the bottom door rubbers. Top the film off with those sexy Alfa kickplates.
All good stuff fella