hi..
Initially you must go through the topics. It is important that you understand the theory. Once you understand the theory, practical will follow and it would be really easy to solve practical questions.
Important Topics would be
Start with Time value of Money
Must go through the Financial analysis part
and Leverage, Financing decision and capital budgeting tools are very important in long run.
hope it will help you. if you would need any detailed info on any topic , you are most invited.