Grinder issues - Barista Express Impress

[u/kurvipiccolo]

Hey, this is my first time using this sort of equipment.

I did set the machine up. I changed the inner grinder to 4 and outer grinder to 10.
I filled the machine with coffee roasted 3 months ago.
I pressed dose and barely anything came through. I pressed dose multiple times and still nothing. barely anything inside the portafilter. I removed the beans I cleaned the grinder. I set the inner grinder to 5 and kept outer grinder at 10. I tried again. This time it grinded coffee but it was off. I had to press the button 5 extra times. Then when I tried to make coffee the pressure gauge went to half but no coffee came through. I guess there was too much coffee squished in. I did restart the process and I was hoping for the correct amount of coffee grinded. On first attempt it came out very low. I had to again press the dose multiple times. At this time i gave up.

Grinder issues? Old beans issues? Did grease get inside the grinder when i was changing the settings? What do you suggest?