Tablet [Q] help needed! regarding root

my galaxy note n7100 currently running on 4.1.2 i want to root my device to be able to install ditto note 3 D3 rom. please tell me whether i can directly flash 4.3 D3 rom running 4.1.2 or i have to update to 4.3 then i will be able to flash? please provide rooting guide and links which are necessary."Thanks alot