When you say IR do you really mean do your IMC rating? A big difference to an IR (Instrment Rating) - about 15 grand to be precise.
If youve just completed your PPL, id get some hours under your belt. It all depends on what route you wish to take to get your ATPL as to when to start each rating.
You might want to post this in the Private Flying forum, stating all this info, im sure people will be happy to help.
Regards.
