1. Yes, but frankly there's never a scenario where I find this useful. The engine bogs for a second then gives it a little gas on your behalf. I get straight to the point and just give it gas to begin with.
2. Yes, this is no problem. Just give the revs time to drop to the right RPM when you do this.
3. I have multiple posts and threads on here bitching about the pedals on this car and how it's impossible to get comfortable and heel-toe in this car. Now, two years later, I'm a little proud to say that I can actually heel-toe this car quite comfortably. Like you, I was new to manual two years ago. Best advice I can give you is always always rev match and get really good at it. Then one day start trying it during a little braking. It feels awkward at first. Slowly, but surely it becomes possible.
4. 1 > 2 gear change on this car is awful. Try double clutching down the line when you're more comfortable.