As you read your textbooks, it helps to go through by systems and think out for each system (a) how will a burn derange this system; and (b) what can I do to prevent/treat the derangement.
FEN (Fluids Electrolytes Nutrition): A burn causes fluid losses that are different from other injuries. Read up on that, as well as the plan for how you deal with it. Do you feed a burn victim early? How?
Skin/wound: Obvious, but not obvious. Learn the depths of burns and how they are different with regard to healing. Also read about eschars and the problems they can cause (compartment syndrome).
... and so on for cardiovascular, pulmonary, gastrointestinal, genitourinary, etc.
Best,
Anka
