Think of something you and your mum might both like to do together.

When she is in a good mood and there is no one else is around, talk to her quietly and sensibly.  Do not criticize her or she won't listen.

See if you can set up a time where she will do something with you.  You could even bribe her by swapping her attention for some help around the house.

I don't know if this will help.   Computers can be very addictive.  

Good luck.