*Given that you are also already fixed wing pilot with more than 100h pic (requirement for IR on fixed wing)
Not really.
JAR-FCL 1.190 Experience
An applicant for an IR(A) shall hold a PPL(A) including a night qualification or CPL(A) and shall have completed at least 50 hours cross-country flight time as pilot in command in aeroplanes or helicopters of which at least 10 hours shall be in aeroplanes.