If you aren't comfortable quitting, and it sounds like you aren't, consider using the time you have to learn skills that might be relevant to ideas you want to

If you aren't comfortable quitting, and it sounds like you aren't, consider using the time you have to learn skills that might be relevant to ideas you want to pursue. Ideally also relevant to your current role if there is overlap. Boredom sounds like what you primarily want to address at present. The alternative is to look for areas where you can contribute more to your current role, but sounds like you have already tried that.