First cat was indoor only but loved escaping - we had the door argument daily for 15 years. I prevailed, generally. The current cats are very happy as indoor cats and display no interest whatsoever in the door or the out of doors, which is good, as it is *hazardous* out there - pit bulls, raccoons, ferals, traffic, etc.

Cats are easy. Keep the box clean, establish a feeding routine you can live with, talk to them, play with them, interact with them, and get them used to dealing with a minder once in a while and they will be fine. And remember, if you do get a cat & have questions, you've got scads of folks on your flist who can answer them for you!

(I adore my cats & miss them a lot right now... the apt I'm in feels very empty without felines.)