Aye. I'm quite a veteran model builder. Been building models since I was 12.
Best model for Beginners? I would recommend 1/35 scale armour as this tends to be the most forgiving type of model there is. Put it simply, since armour, particularly WW2 armour, in real life tends to get knocked around fairly often, paint jobs on the field tends to result in a lot of overspray as well as the standard weathering they get from being exposed to the elements all the time, you really don't need to worry about keeping your paintjobs pristine like you would an aircraft or an automobile model.
Tamiya armour kits tend to be good beginner kits despite the fact that they tend to cost quite a bit as the kits this company provides has excellently molded parts that fit almost seamlessly together so you don't really need to worry too much about using gap filling cement and such to deal with ill fitting parts.
As for your little green army men. I would recommend you look up any 1/35 scale figurines by Dragon at your local hobby shop, the level of detail in those figurines will positively blow you away.
As for scale, again I recommend 1/35 as this provides an excellent level of detail while still remaining not too demanding on storage space.
With regards to links, well it really depends on what type of model you wish to build. the following sites may prove usefull though.
This has some kits you can look at for ideas and they also have how to articles:
Missing Lynx
This is a good resource for modern military equipment.
FAS
The forums here can provide you with good info for building and painting German WW2 AFV's and figurines.
Achtung Panzer