Engine question bout my engine....

question bout my engine....

I dont have a lic.(dumb me got it suspended again) right now so my car is just sitting here in my garage, I run my car about once a week I just pull it out let it sit there with the engine running for about 10min then put it back inside and every 2 weeks or so ill take it around the block a couple of times. is it bad for me to just let it idle like that?? and should I be doing anything eles more often??
thanks!