well full time work in the game industry for concept art is rare, because its pointless to hire a concept artist in most cases for pre production because once pre production is done, what are they gonna do? my advice is learn how to texture and model, if you can do this and are good at designing characters u have a good shot at getting these rare jobs, keep in mind you have to be very good, think along the lines of the pros on these boards. also im not sure how lego works but if ur hired full time ur on salary so you might work shit loads of hours towards crunch, the end of production. id say their are around 500 of these jobs according to jason manley and i think that sounds about right. most companies list such job postings with details of what they want, you should get good at other things to, such as enviroments props etc. the more you can do the more likely you will get work.
Nathan Campbells 3 steps to drawing like a pro, 1. Sketch 2. shade. 3. highlights and ur done