I take it the IR(R) is a pared down version of ICAO IR?
Considerably less, only 12 hours IF required.
You should be aware that Skydiving clubs like to use skydivers as their pilots and Gliding clubs will only want to use pilots with gliding experience so if you have neither of these you are not likely to get a look in. To be reminerated as a pilot, with the exception of flight instruction you will need a CPL.