I've just completed my first warband and to get started, I think it pretty much comes down to this (hope it helps)
1) prepare your models (cut from sprue, wash, file away mould lines etc)
2) prime - I sprayed all my models with black primer.
3) base layers - think about the basic colour blocks for each model. So for example, green cloak, brown leather armour, grey undershirt etc. Dont start with any detail, layer the model.
NB: don't use too much paint and do use good brushes!
4) shading - use a wash like agrax earth shade or nuln oil to give the model shading. Let them dry completely before moving on.
5) drybrush for hair, chainmail etc (maybe pre -wash or apply second wash to those areas.
6) highlights - identify slightly raised points on the model and use slightly lighter versions of colour (maybe mix with white or bleached colour 1:1 ratio)
Leave finest detail to the end and be methodical! I'm no painting expert but that pretty much breaks down how I tackled my first models
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