I suppose there really isn't anything you can say other than "I'm working on it, this is just a side thing" in order to get them to leave you alone.
Also depends on who's telling you to get a job. If you don't value your relationship with these people, you can easily just tell them to F off. If it's your family and you're living under their roof, you kinda gotta do what they say. Just do whatever pleases them, while still putting a lot of effort into IM, and when you get your check show it to them so they know you're serious business and not just dicking around.