Indirect tax is a kind of subject you cant learn.. you need to adapt to it through concise notes and develop writing habits as required for exam and legally adopted words with citation of Case laws as and when required.
Further just follow the pattern followed in past exam and practice accordingly.....
Pattern are almost same and dont forget to solve RTP and practice manual of atleast three terms.
All the best. just give couple of hour a day than putting day in & out.. u will feel it interesting...