hi AFC
Although I'm a newbie modeller too, maybe some of my thoughts may help you.
Firstly, there's no doubt this forum is a great place for help and information, the guys here are very helpful and knowledgeable. Have a look at their galleries and you'll see they know how to make good models.
Like you, when I started, I wanted to know as much as I could straight away. Not a lot wrong with that but I did discover that just getting on with it and trying different paints/kits, and making the mistakes along the way, was (is) also very helpful (of course, you say

). Like Steve says, guys get to prefer certain brands, and these may not suit another proficient modeller, who will have his own preferences. One thing about getting on with it, I did find myself spending too much time browsing forums and the like, and not enough time doing my practical learning.
My preferred model topic is aircraft, and I decided to buy non-expensive Academy and Revell kits. The Academy kits entail a bit of research on colours, which is fun in itself, and Revell make it easy if you use their colours. Both provide good quality kits for the price, with Academy the better of the two in my opinion. I avoid Airfix unless I see a good review about the kit (because I did buy a couple of kits in a bricks-and-mortar shop one day on an impulse and was hugely disappointed when I got them home and opened the boxes!).
I am trying hand-painting as well as airbrush, although focussing on hand-painting at the moment and my preferred scale is 1:72. I am trying different paints and so far, am pleased with the results from Vallejo Model Color(Acrylic), Revell Aqua(Acrylic), Xtracrylix, and Humbrol (both acrylics & enamels). All these give a good finish without brush marks. Good quality brushes are essential ( I use Javis sable brushes and Tamiya flat brushes). I am currently trying Revell enamels, which so far, seem ok, but not as good as Humbrol enamels. I intend to try Model Master enamels soon as well. What I am quickly discovering, is that ONE paint manufacturer will not satisfy all occasions, and I will use a mix of types where appropriate(to me).
I have only scratched the surface of materials/kits available, and look forward to trying more and no doubt incurring a few mishaps along the way.
Going back to this forum, and the help herein, I have definitely saved myself some frustrations by discovering tips whilst browsing, but I do try to get back to my practical lessons

The forum is so interesting, it's hard to get away and do something so I browse whilst paint is drying or something
happy modelling
Mark