ID11 and D76 are the same times. So is final result.
Get you time from HP5 and ID11 from the data sheet on Ilfords web page. These times and agitation are perfect for a diffusion enlarger/ #2 paper. Subtract 10% for condenser. They conveniently list times for non Ilford developers and they are way too long, although the Ilford times are perfect.
If you have valuable images, run a test of 6 exposures ,12" of film, from a new roll.
Skipping around different films is the worst thing you can do. Pick something you can get easily and stay with it unless it is odd ball like Perutz.
I don`t like grainy films, so I do not use them. To each his own however.